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capitate rush, dwarf rush, leafy-bract dwarf rush

dichotomous rush, fork rush

Habit Herbs, annual, cespitose, 0.3–1 dm. Herbs, perennial, to 10 dm.
Rhizomes

densely branched to short- creeping.

Culms

to 20.

Cataphylls

1–3.

Leaves

basal;

auricles absent;

blade 0.5–2.5 cm × 0.5 mm.

basal, (1-)2-3;

auricles 0.2-0.5(-0.6) mm, scarious to leathery;

blade nearly terete, channeled or flat, 10-25(-40) cm × (0.5-)0.7-1(-1.2) mm, margins entire.

Inflorescences

glomerules 1–2, each with 2–10(–14) flowers;

bracts subtending inflorescence 1(–2), foliose, clearly surpassing inflorescence.

terminal, (5–)10–85(–100)-flowered, congested to somewhat loose, (1-)2.5-10(-13) cm;

primary bract usually exceeding inflorescence.

Flowers

tepals 6, tan to brownish, subulate, lanceolate-ovate, 3.5–4.5(–5) mm, 2 times length of inner tepals, margins scarious;

inner series delicate, shorter, apex acute;

stamens 3, filaments 1 mm, anthers 0.5 mm;

style 0.4–0.7 mm.

bracteoles 2;

tepals green, lanceolate, (3-)3.3-4.5(-5.5) mm;

outer and inner series nearly equal;

stamens 6, filaments 0.6–1.2 mm, anthers 0.4-0.8(-1) mm;

style 0.2 mm.

Capsules

tan to reddish brown, 3-locular, globose to obovoid, 1.2–1.7 mm, shorter than tepals.

tan to brown, 1-locular to pseudo-3-locular, ellipsoid to widely so, (2.5-)2.8-3.5(-4.5) × 1x 1.6-2.2 mm.

Seeds

ellipsoid-ovoid, 0.3–0.4 mm.

brownish to amber, ellipsoid to lunate, 0.3-0.4 mm, not tailed.

2n

= 18.

= ca. 80.

Juncus capitatus

Juncus dichotomus

Phenology Flowering and fruiting spring. Flowering and fruiting late spring–summer.
Habitat Moist to wet areas, usually in sandy, often disturbed soil such as roadsides or along trails Ditches, shores, clearings, and other typically open areas, usually in sandy, well-drained (but frequently wet) soil
Elevation below 1000 m (below 3300 ft)
Distribution
from FNA
CA; LA; OK; TX; native; Africa (north); Europe; Asia (Near East) [Introduced in North America]
[WildflowerSearch map]
[BONAP county map]
from FNA
AL; AR; CO; CT; DC; DE; FL; GA; KY; LA; MA; MD; MS; NC; NJ; NY; OH; PA; RI; SC; TN; VA; WV; Mexico; Central America; South America; Texas
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 22. FNA vol. 22.
Parent taxa Juncaceae > Juncus > subg. Graminifolii Juncaceae > Juncus > subg. Poiophylli
Sibling taxa
J. acuminatus, J. acutiflorus, J. acutus, J. alpinoarticulatus, J. anthelatus, J. arcticus, J. articulatus, J. biglumis, J. bolanderi, J. brachycarpus, J. brachycephalus, J. brachyphyllus, J. brevicaudatus, J. bryoides, J. bufonius, J. bulbosus, J. caesariensis, J. canadensis, J. capillaris, J. castaneus, J. chlorocephalus, J. compressus, J. confusus, J. cooperi, J. coriaceus, J. covillei, J. debilis, J. dichotomus, J. diffusissimus, J. drummondii, J. dubius, J. dudleyi, J. effusus, J. elliottii, J. ensifolius, J. falcatus, J. filiformis, J. filipendulus, J. georgianus, J. gerardii, J. greenei, J. gymnocarpus, J. hallii, J. hemiendytus, J. howellii, J. inflexus, J. interior, J. kelloggii, J. leiospermus, J. lesueurii, J. longistylis, J. luciensis, J. macrandrus, J. macrophyllus, J. marginatus, J. maritimus, J. megacephalus, J. mertensianus, J. militaris, J. nevadensis, J. nodatus, J. nodosus, J. occidentalis, J. orthophyllus, J. oxymeris, J. parryi, J. patens, J. pelocarpus, J. pervetus, J. phaeocephalus, J. polycephalus, J. regelii, J. repens, J. roemerianus, J. scirpoides, J. secundus, J. squarrosus, J. stygius, J. subcaudatus, J. subtilis, J. supiniformis, J. tenuis, J. texanus, J. textilis, J. tiehmii, J. torreyi, J. trifidus, J. triformis, J. triglumis, J. trigonocarpus, J. uncialis, J. validus, J. vaseyi, J. xiphioides
J. acuminatus, J. acutiflorus, J. acutus, J. alpinoarticulatus, J. anthelatus, J. arcticus, J. articulatus, J. biglumis, J. bolanderi, J. brachycarpus, J. brachycephalus, J. brachyphyllus, J. brevicaudatus, J. bryoides, J. bufonius, J. bulbosus, J. caesariensis, J. canadensis, J. capillaris, J. capitatus, J. castaneus, J. chlorocephalus, J. compressus, J. confusus, J. cooperi, J. coriaceus, J. covillei, J. debilis, J. diffusissimus, J. drummondii, J. dubius, J. dudleyi, J. effusus, J. elliottii, J. ensifolius, J. falcatus, J. filiformis, J. filipendulus, J. georgianus, J. gerardii, J. greenei, J. gymnocarpus, J. hallii, J. hemiendytus, J. howellii, J. inflexus, J. interior, J. kelloggii, J. leiospermus, J. lesueurii, J. longistylis, J. luciensis, J. macrandrus, J. macrophyllus, J. marginatus, J. maritimus, J. megacephalus, J. mertensianus, J. militaris, J. nevadensis, J. nodatus, J. nodosus, J. occidentalis, J. orthophyllus, J. oxymeris, J. parryi, J. patens, J. pelocarpus, J. pervetus, J. phaeocephalus, J. polycephalus, J. regelii, J. repens, J. roemerianus, J. scirpoides, J. secundus, J. squarrosus, J. stygius, J. subcaudatus, J. subtilis, J. supiniformis, J. tenuis, J. texanus, J. textilis, J. tiehmii, J. torreyi, J. trifidus, J. triformis, J. triglumis, J. trigonocarpus, J. uncialis, J. validus, J. vaseyi, J. xiphioides
Synonyms J. dichotomus var. platyphyllus, J. tenuis var. dichotomus, J. tenuis var. platyphyllus, J. platyphyllus
Name authority Weigel: Observ. Bot. 28. (1772) Elliott
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