Flora of North America species comparison

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Agalinis pulchella

Agalinis caddoensis

beautiful false foxglove, purple gerardia, St. Mark's false foxglove

Caddo false foxglove
Stems

branched, 50–120 cm;

branches spreading-ascending, quadrangular-ridged, scabrous.

widely branched, 20–60 cm;

branches ascending, angular distally, scabridulous.
Leaves

spreading-ascending;

blade filiform, 16–40 x 0.4–1 mm, margins entire, midvein harshly scabrous, adaxial surface scabrous;

axillary fascicles: length 1/2–1 times subtending leaves.

spreading or reflexed or recurved;

blade filiform, 15–35 x 0.3–0.6 mm, margins entire, siliceous, adaxial surface scabrellous;

axillary fascicles absent.
Inflorescences

racemiform-paniculiform, flowers 1 per node, some flowers pseudoterminal;

bracts shorter than pedicels.

racemes, flowers 1 or 2 per node;

bracts equal to or shorter than pedicels.
Pedicels

spreading-ascending, 12–50 mm, scabrous.

spreading-ascending, 7–22 mm, proximally scabridulous.
Flowers

calyx hemispheric, tube 3–4(–5) mm, glaucous, lobes erect, subulate, 0.1–0.6 mm;

corolla dark pink to rose, with 2 yellow lines and purple spots in abaxial throat, 22–33 mm, throat sparsely pilose externally and glabrous within across bases of adaxial lobes, sparsely villous at sinus, lobes: abaxial reflexed-spreading, adaxial spreading, 6–12 mm, equal, glabrous externally;

proximal anthers parallel to filaments, distal perpendicular to filaments, pollen sacs 2.5–3.8 mm;

style strongly exserted, 9–18 mm.

calyx hemispheric-campanulate, tube 3.5–5.5 mm, glabrous, lobes triangular-subulate, 0.8–1.7 mm;

corollas rose purple, with 2 yellow lines and red spots in abaxial throat, 17–30 mm, throat pilose externally and glabrous within across bases of adaxial lobes, lobes spreading, 6–9(–11) mm, glabrous externally;

proximal anthers parallel to filaments, distal perpendicular to filaments, pollen sacs 2.5–3.8 mm;

style exserted, 12–16.5 mm.
Capsules

globular, 4–6 mm.

unknown.
Seeds

black, 0.5–0.8 mm.

unknown.
2n

= 26.

Agalinis pulchella

Agalinis caddoensis
Phenology Flowering Sep–early Oct. Flowering Oct.
Habitat Dry, open pine savannas, open pine-oak sandhills, dry upslope areas of wiregrass-dominated mesic prairies, chalky glades or roadsides, dry sandy or clay roadsides beside existing or remnant savannas. Oak woods, dry loamy soils.
Elevation 0–100 m. (0–300 ft.) 50–100 m. (200–300 ft.)
Distribution
from FNA
AL; FL; GA; LA; MS; TX
[WildflowerSearch map]
[BONAP county map]
from FNA
LA
[BONAP county map]
Discussion

Agalinis pulchella is an uncommon species in the easternmost area of its range and is common only westward in southeastern Texas.

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

Agalinis caddoensis is known only from two collections made by F. W. Pennell in 1913 and is most similar morphologically to A. navasotensis; see 22. A. navasotensis for a comparison. Agalinis caddoensis should be expected in northwestern Louisiana and eastern Texas and likely flowers in September as does A. navasotensis.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 17, p. 551. FNA vol. 17, p. 540.
Parent taxa Orobanchaceae > Agalinis Orobanchaceae > Agalinis
Sibling taxa
A. aphylla, A. aspera, A. auriculata, A. caddoensis, A. calycina, A. decemloba, A. densiflora, A. divaricata, A. edwardsiana, A. fasciculata, A. filicaulis, A. filifolia, A. flexicaulis, A. gattingeri, A. georgiana, A. harperi, A. heterophylla, A. homalantha, A. laxa, A. linifolia, A. maritima, A. navasotensis, A. neoscotica, A. obtusifolia, A. oligophylla, A. plukenetii, A. purpurea, A. setacea, A. skinneriana, A. strictifolia, A. tenella, A. tenuifolia, A. viridis
A. aphylla, A. aspera, A. auriculata, A. calycina, A. decemloba, A. densiflora, A. divaricata, A. edwardsiana, A. fasciculata, A. filicaulis, A. filifolia, A. flexicaulis, A. gattingeri, A. georgiana, A. harperi, A. heterophylla, A. homalantha, A. laxa, A. linifolia, A. maritima, A. navasotensis, A. neoscotica, A. obtusifolia, A. oligophylla, A. plukenetii, A. pulchella, A. purpurea, A. setacea, A. skinneriana, A. strictifolia, A. tenella, A. tenuifolia, A. viridis
Synonyms Gerardia pulcherrima Gerardia caddoensis
Name authority Pennell: Bull. Torrey Bot. Club 40: 428. (1913) Pennell: Proc. Acad. Nat. Sci. Philadelphia 73: 519. (1922)
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).



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