Flora of North America species comparison

The green links below add additional plants to the comparison table. Blue links lead to other Web sites.
enable glossary links

Carex digitalis

Carex sect. Careyanae

carex digital, slender wood sedge, slender woodland sedge
Habit Plants densely cespitose. Plants densely or loosely cespitose, short-rhizomatous.
Culms

erect or ascending, 7–52 cm × 0.5–1 mm.

brown or purple at base.
Leaves

basal sheaths white or light brown;

nonbasal sheaths green, 8–37 mm;

blades green, 8–44 cm × 0.8–5 mm, shorter than or overtopping culm, 0.5–1.3(–1.8) times as tall as tallest flowering culm;

blades of vegetative shoots 1–3.5 times wider than bract blades.

basal sheaths not fibrous;

sheath fronts membranous;

blades M-shaped in cross section when young, adaxial side of blades with 2 lateral veins more prominent than midvein, leaves often over 10 mm wide, cauline leaves sometimes bladeless, glabrous.
Bracts

2.2–11.4 cm × 1–3 mm.

Inflorescences

spikes (2–)4 per culm, scattered;

peduncles of pistillate spikes 0.5–10.2 cm; of staminate spike 0.4–8.7 cm.

racemose, with 3–5(–6) spikes;

proximal nonbasal bracts leaflike or bladeless, long-sheathing;

lateral spikes pistillate, frequently basal, sometimes with 1–2 staminate flowers proximally, pedunculate, prophyllate;

terminal spike staminate.
Perigynia

3–9 per spike, finely veined, obovoid, 2–4.2 × 1.2–1.8 mm;

beak tapering.

ascending, distinctly 8-veined or more, sessile, broadly to narrowly ovate, acutely trigonous in cross section, base tapering, truncate, apex tapering to beak, glabrous;

beak less than or more than 5 mm, orifice entire.
Style

slender, ascending through entire orifice.

Achenes

obovoid, 1.8–2.8 × 1–1.6 mm, sides plane or slightly concave at maturity, tightly fitting perigynia.

trigonous, smaller than bodies of perigynia;

style deciduous.
Pistillate

spikes: proximal usually basal, erect, ascending, or drooping, short to long pedunclulate, 6–18 × 4–5 mm.; pistillate scales keeled, 1.8–2 × 1–1.2 mm, midribs green, margins hyaline, apex acute, proximal scales of lateral spikes subtending perigyinia.

Staminate

spike 1, linear to linear-clavate, 11–24 × (1–)1.2–2.7 mm.; staminate scales oblong, 2–3.6(–5.5) × 1–1.5 mm, midribs green, margins hyaline, frequently brown tinged, apex acute.

Anthers

2–3.3 mm.

Proximal

pistillate scales with apex obtuse to awned.
Stigmas

3.

Carex digitalis

Carex sect. Careyanae
Distribution
from FNA
AL; AR; CT; DC; DE; FL; GA; IL; IN; KY; LA; MA; MD; ME; MI; MO; MS; NC; NH; NJ; NY; OH; OK; PA; RI; SC; TN; TX; VA; VT; WI; WV; NS; ON; QC; temperate e North America
[WildflowerSearch map]
[BONAP county map]
Temperate e North America
Discussion

Varieties 3 (3 in the flora).

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Species 8 (8 in the flora).

Eight species formerly included in sect. Laxiflorae in recent floras have been segregated into sect. Careyanae. See R. F. C. Naczi et al. (2001) for distinguishing these sections and also discussion under sect. Laxiflorae.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Key
1. Terminal spike usually surpassing bract blade of distal lateral spike; longest peduncle of staminate spike (6.3–)8.1–15.9 cm; widest leaves 2–2.9(–3.5) mm wide; perigynia 7–10-veined.
var. macropoda
1. Terminal spike usually surpassed by bract blade of distal lateral spike; longest peduncle of staminate spike 0.9–7.2(–11.4) cm; widest leaves 2.7–4.5(–5.3) mm wide; perigynia (8–)11–15-veined.
→ 2
2. Peryginia 2.5–3.3 mm, apex barely excurved.
var. digitalis
2. Perigynia 3.2–4.2 mm, apex noticeably excurved.
var. floridana
1. Basal sheaths purple or reddish purple.
→ 2
1. Basal sheaths white to tan or brown.
→ 4
2. Widest leaf blades (2–)3–6(–7) mm wide; peduncles of lateral pistillate spikes usually drooping.
C. austrocaroliniana
2. Widest leaf blades 10–25(–32) mm wide; peduncles of lateral pistillate spikes usually erect or spreading, rarely drooping.
→ 3
3. Bracts from middle and proximal portions of culms bladeless or with blades 0.8–2 cm; perigynia 3.7–4.9 mm; longest lateral spike with 9–13 peryginia.
C. plantaginea
3. Bracts from middle and proximal portions of culms with blades 2.1–9.2 cm; perigynia 5–6.6 mm; longest lateral spike with 4–9 perigynia.
C. careyana
4. Leaf blades of vegetative shoots 3.8–9 times wider than bract blades; widest leaves (7–)11–28 mm wide; bract blades from middle and proximal portions of culms 2–6.2 cm; leaves glaucous.
C. platyphylla
4. Leaf blades of vegetative shoots 1–3.5 times wider than bract blades; widest leaves 0.8–14 mm wide; bract blades from middle and proximal portions of culms (1–)4.5–28 cm; leaves green or glaucous.
→ 5
5. Proximal scales of lateral spikes sterile or subtending a staminate flower; pistillate scales 2.5–3.2 mm.
C. laxiculmis
5. Proximal scales of lateral spikes subtending perigynia; pistillate scales 1.3–2.2 mm.
→ 6
6. Staminate spikes (1–)1.2–2.7 mm wide; staminate scales acute, those from center of spike 3.6–5.5 mm; vegetative shoots shorter than or slightly taller than culms, tallest vegetative shoot 0.5–1.3(–1.8) times as tall as tallest flowering culm.
C. digitalis
6. Staminate spikes 0.6–1.4(–1.6) mm wide; staminate scales obtuse, those from center of spike 2.6–3.6(–3.8) mm; vegetative shoots taller than culms, tallest vegetative shoot (1.4–)1.7–3.7(–4.9) times as tall as tallest flowering culm.
→ 7
7. Plants densely cespitose; perigynia 4–8(–9), distichously overlapping; peduncles of proximal spikes usually drooping; blade of bract of distal lateral spike (12–)17–51 times as long as wide; longest staminate spike (8.3–)9.6– 16(–21.1) mm.
C. cumberlandensis
7. Plants loosely or densely cespitose; perigynia (6–)8–13, spirally overlapping; peduncles of proximal spikes usually erect; blade of bract of distal lateral spike 5.6–17(–26) times as long as wide; longest staminate spike (3.5–)4.5–10.2(–11.5) mm.
C. abscondita
Source FNA vol. 23, p. 445. FNA vol. 23. Authors: Charles T. Bryson, Robert F. C. Naczi.
Parent taxa Cyperaceae > Carex > sect. Careyanae Cyperaceae > Carex
Sibling taxa
C. aboriginum, C. abrupta, C. abscondita, C. acidicola, C. acutiformis, C. adelostoma, C. adusta, C. aestivalis, C. aggregata, C. alata, C. albicans, C. albida, C. albolutescens, C. albonigra, C. albursina, C. alma, C. alopecoidea, C. amphibola, C. amplectens, C. amplifolia, C. angustata, C. annectens, C. anthoxanthea, C. aperta, C. appalachica, C. aquatilis, C. arapahoensis, C. arcta, C. arctata, C. arctiformis, C. arenaria, C. argyrantha, C. arkansana, C. assiniboinensis, C. atherodes, C. athrostachya, C. atlantica, C. atrata, C. atratiformis, C. atrofusca, C. atrosquama, C. aurea, C. aureolensis, C. austrina, C. austrocaroliniana, C. backii, C. baileyi, C. baltzellii, C. barbarae, C. barrattii, C. basiantha, C. bebbii, C. bella, C. bicknellii, C. bicolor, C. bigelowii, C. biltmoreana, C. blanda, C. bolanderi, C. bonanzensis, C. brainerdii, C. brevicaulis, C. brevior, C. breweri, C. bromoides, C. brunnescens, C. brysonii, C. bulbostylis, C. bullata, C. bushii, C. buxbaumii, C. calcifugens, C. californica, C. canescens, C. capillaris, C. capitata, C. careyana, C. caroliniana, C. caryophyllea, C. castanea, C. cephaloidea, C. cephalophora, C. chalciolepis, C. chapmanii, C. cherokeensis, C. chihuahuensis, C. chordorrhiza, C. circinata, C. collinsii, C. communis, C. comosa, C. complanata, C. concinna, C. concinnoides, C. congdonii, C. conjuncta, C. conoidea, C. constanceana, C. cordillerana, C. corrugata, C. crawei, C. crawfordii, C. crebriflora, C. crinita, C. cristatella, C. crus-corvi, C. cryptolepis, C. cumberlandensis, C. cumulata, C. curatorum, C. cusickii, C. dasycarpa, C. davisii, C. davyi, C. debilis, C. decomposita, C. deflexa, C. densa, C. deweyana, C. diandra, C. diluta, C. disperma, C. distans, C. disticha, C. divisa, C. divulsa, C. douglasii, C. duriuscula, C. ebenea, C. eburnea, C. echinata, C. edwardsiana, C. egglestonii, C. eleusinoides, C. elliottii, C. elynoides, C. emoryi, C. endlichii, C. engelmannii, C. epapillosa, C. exilis, C. exsiccata, C. extensa, C. festucacea, C. feta, C. filifolia, C. fissa, C. fissuricola, C. flacca, C. flaccosperma, C. flava, C. floridana, C. foenea, C. folliculata, C. formosa, C. fracta, C. frankii, C. fuliginosa, C. garberi, C. geophila, C. geyeri, C. gholsonii, C. gigantea, C. glacialis, C. glareosa, C. glaucescens, C. glaucodea, C. globosa, C. gmelinii, C. godfreyi, C. gracilescens, C. gracilior, C. gracillima, C. granularis, C. gravida, C. grayi, C. grisea, C. gynandra, C. gynocrates, C. gynodynama, C. halliana, C. hallii, C. harfordii, C. hassei, C. haydeniana, C. haydenii, C. heleonastes, C. helleri, C. hendersonii, C. heteroneura, C. heterostachya, C. hirsutella, C. hirta, C. hirtifolia, C. hirtissima, C. hitchcockiana, C. holostoma, C. hoodii, C. hookeriana, C. hormathodes, C. hostiana, C. houghtoniana, C. hyalina, C. hyalinolepis, C. hystericina, C. idahoa, C. illota, C. impressinervia, C. incurviformis, C. infirminervia, C. inops, C. integra, C. interior, C. interrupta, C. intumescens, C. jamesii, C. jonesii, C. joorii, C. juniperorum, C. kobomugi, C. kraliana, C. krausei, C. lachenalii, C. lacustris, C. laeviconica, C. laeviculmis, C. laevivaginata, C. lapponica, C. lasiocarpa, C. latebracteata, C. lativena, C. laxa, C. laxiculmis, C. laxiflora, C. leavenworthii, C. lemmonii, C. lenticularis, C. leporinella, C. leptalea, C. leptonervia, C. leptopoda, C. limosa, C. livida, C. loliacea, C. lonchocarpa, C. longii, C. louisianica, C. lucorum, C. lupuliformis, C. lupulina, C. lurida, C. lutea, C. luzulifolia, C. luzulina, C. lyngbyei, C. mackenziei, C. macloviana, C. macrocephala, C. macrochaeta, C. magellanica, C. manhartii, C. marina, C. mariposana, C. maritima, C. mckittrickensis, C. meadii, C. media, C. melanostachya, C. membranacea, C. mendocinensis, C. merritt-fernaldii, C. mertensii, C. mesochorea, C. michauxiana, C. microchaeta, C. microdonta, C. microglochin, C. micropoda, C. microptera, C. misera, C. missouriensis, C. mitchelliana, C. molesta, C. molestiformis, C. muehlenbergii, C. multicaulis, C. multicostata, C. muricata, C. muriculata, C. muskingumensis, C. nardina, C. nebrascensis, C. nelsonii, C. nervina, C. neurophora, C. nigra, C. nigricans, C. nigromarginata, C. normalis, C. norvegica, C. nova, C. novae-angliae, C. nudata, C. obispoensis, C. obnupta, C. obtusata, C. occidentalis, C. oklahomensis, C. oligocarpa, C. oligosperma, C. opaca, C. oreocharis, C. ormostachya, C. oronensis, C. ouachitana, C. ovalis, C. oxylepis, C. ozarkana, C. pachystachya, C. paeninsulae, C. paleacea, C. pallescens, C. panicea, C. pansa, C. parallela, C. parryana, C. pauciflora, C. paysonis, C. peckii, C. pedunculata, C. pellita, C. pelocarpa, C. pendula, C. pensylvanica, C. perdentata, C. perglobosa, C. petasata, C. petricosa, C. phaeocephala, C. picta, C. pigra, C. pityophila, C. planispicata, C. planostachys, C. plantaginea, C. platyphylla, C. pluriflora, C. podocarpa, C. polymorpha, C. praeceptorum, C. praegracilis, C. prairea, C. prasina, C. praticola, C. preslii, C. projecta, C. proposita, C. pseudocyperus, C. pumila, C. purpurifera, C. radfordii, C. radiata, C. ramenskii, C. rariflora, C. raynoldsii, C. recta, C. reniformis, C. retroflexa, C. retrorsa, C. richardsonii, C. roanensis, C. rosea, C. rossii, C. rostrata, C. rotundata, C. rufina, C. rupestris, C. ruthii, C. sabulosa, C. salina, C. sartwelliana, C. sartwellii, C. saxatilis, C. saximontana, C. scabrata, C. scabriuscula, C. schottii, C. schweinitzii, C. scirpoidea, C. scoparia, C. scopulorum, C. senta, C. seorsa, C. serpenticola, C. serratodens, C. sheldonii, C. shinnersii, C. shortiana, C. siccata, C. silicea, C. simulata, C. socialis, C. sparganioides, C. specifica, C. spectabilis, C. specuicola, C. spicata, C. spissa, C. sprengelii, C. squarrosa, C. stenoptila, C. sterilis, C. stevenii, C. stipata, C. straminea, C. straminiformis, C. striata, C. striatula, C. stricta, C. styloflexa, C. stylosa, C. subbracteata, C. suberecta, C. subfusca, C. subnigricans, C. subspathacea, C. superata, C. supina, C. swanii, C. sychnocephala, C. sylvatica, C. tahoensis, C. tenax, C. tenera, C. tenuiflora, C. tetanica, C. tetrastachya, C. texensis, C. thornei, C. thurberi, C. timida, C. tincta, C. tompkinsii, C. tonsa, C. torreyi, C. torta, C. triangularis, C. tribuloides, C. trichocarpa, C. triquetra, C. trisperma, C. tuckermanii, C. tumulicola, C. turbinata, C. turgescens, C. typhina, C. umbellata, C. unilateralis, C. ursina, C. utriculata, C. vacillans, C. vaginata, C. vallicola, C. venusta, C. vernacula, C. verrucosa, C. vesicaria, C. vestita, C. vexans, C. virescens, C. viridula, C. vulpinoidea, C. whitneyi, C. wiegandii, C. willdenowii, C. williamsii, C. woodii, C. wootonii, C. xerantica
Subordinate taxa
C. digitalis var. digitalis, C. digitalis var. floridana, C. digitalis var. macropoda
C. abscondita, C. austrocaroliniana, C. careyana, C. cumberlandensis, C. digitalis, C. laxiculmis, C. plantaginea, C. platyphylla
Name authority Willdenow: Sp. Pl. 4(1): 298. (1805) Tuckerman ex Kükenthal: in H. G. A. Engler, Pflanzenr. 20[IV,38]: 522. (1909)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



Type/paste one or more Latin names into the boxes above; matching taxa will show up below the box as you type. You can use the up/down arrow keys to move through the list.

(If the plant you're looking for doesn't show up in the auto-complete list, that means it either isn't described in Flora of North America yet, or it's listed under a synonym. And please note that Flora of North America is still missing several plant families, including Fabaceae, Apiaceae, Boraginaceae, and Polemoniaceae.)

Choose a data source: Flora of North America

The species comparison tool is brought to you by:
Northwest Wildflowers