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blood rush, dwarf rush, Herman's dwarf rush, Hermann's dwarf rush, juncus hemiendytus

brown-fruit rush, jonc à fruits bruns

Habit Herbs, annual, cespitose, 0.03–0.36 dm. Herbs, perennial, rhizomatous, 0.3–7 dm.
Rhizomes

1–3 mm diam., nodes not swollen.

Culms

to 5.

erect, terete, 1–2 mm diam., smooth.

Cataphylls

0 (rarely 1, straw-colored, apex obtuse).

Leaves

to 1.8 cm, 1/2–1 1/3 height of plant.

basal 0–2, cauline 1–4, small fascicles of short capillary leaves often on rhizomes and stems;

auricles 0.3–1 mm, apex rounded, membranaceous;

blade terete, 1.5–11 cm × 0.8–1.1 mm.

Inflorescences

solitary flowers.

terminal cymes, flowers single or paired at nodes, (rarely in 3s), 2–25 cm, branches spreading to erect;

primary bract erect.

Flowers

2-merous;

: tepals 4(–6), erect to recurved at maturity, reddish, 1.5–3 × 0.5–1.2 mm;

outer and outer series nearly equal, apex rounded to acute;

stamens 2(–3), filaments 0.5–1.4 mm, anthers 0.3–0.7 mm;

style 0.1–0.4 mm, stigma 2(–3), 0.3–1 mm.

tepals straw-colored, oblong;

outer tepals 1.6–2.3 mm, apex obtuse;

inner tepals 1.8–2.8 mm, apex obtuse;

stamens 6, anthers 2–3 times filament length.

Capsules

reddish, 2–- or 3-locular, obovoid to ellipsoid or oblate, 1.9–3.5 × 1–2 mm.

included to exserted, chestnut brown, 1-locular, narrowly ovoid, 1.5–3.5 mm, apex acute proximal to beak, valves separating at dehiscence, fertile only proximal to middle.

Seeds

ovoid to oblate, 0.3–0.55 mm.

ovoid, 0.3–0.5 mm, not tailed;

body clear yellow-brown.

2n

= 40.

Juncus hemiendytus

Juncus pelocarpus

Phenology Fruiting late summer–fall.
Habitat Shores, peat bogs, sandy soils, pools, occasionally submersed in lakes, rarely in salt water
Elevation 0–600 m (0–2000 ft)
Distribution
from USDA
[WildflowerSearch map]
[BONAP county map]
from FNA
AL; CT; DC; DE; FL; GA; IN; MA; MD; ME; MI; MN; NC; NH; NJ; NY; OH; PA; RI; SC; VA; VT; WI; BC; NB; NF; NS; ON; PE; QC
[WildflowerSearch map]
[BONAP county map]
Discussion

Varieties 2 (2 in the flora).

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

Populations from Virginia and south have been separated as Juncus pelocarpus var. crassicaudex (J. abortivus) based on their taller culms and thicker rhizomes. The evidence used to support the varietal status for the southeastern plants (N. A. Murray and D. M. Johnson 1987) clearly demonstrates that these plants are the southern end of a cline.

The flowers are often replaced by bulbils.

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

Key
1. Bracts proximal to inflorescence, 1–2
var. hemiendytus
1. Bracts proximal to inflorescence absent
var. abjectus
Source FNA vol. 22, p. 232. FNA vol. 22, p. 245.
Parent taxa Juncaceae > Juncus > subg. Graminifolii Juncaceae > Juncus > subg. Septati
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. capitatus, 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. 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. 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. 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
Subordinate taxa
J. hemiendytus var. abjectus, J. hemiendytus var. hemiendytus
Synonyms J. brachystylus, J. brachystylus var. uniflorus, J. triformis var. uniflorus J. abortivus, J. pelocarpus var. crassicaudex, J. pelocarpus var. sabulonensis
Name authority F. J. Hermann: Leaflets of Western Botany 5: 118. (1948) E. Meyer: Syn. Luzul. 30. (1823)
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