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Howell's rush

Drummond rush, Drummond's rush, three-flower rush

Habit Herbs, perennial, 2–6 dm. Herbs, perennial, strongly tufted, to 4 dm.
Rhizomes

long creeping.

densely short-branched.

Culms

erect, slightly compressed, never rooting at nodes.

terete.

Cataphylls

several.

Leaves

basal 2–4, cauline 2–3;

auricles 1–3 mm, apex rounded to acutish, membranous;

blade flat, 10–30 cdm × 2–4 mm, reduced distally, margins occasionally papillose.

blade absent or rarely present, to 1 cm.

Inflorescences

glomerules, usually 3–9, each with 3–8(–10) flowers, open, 2–9 cm;

primary bract much shorter than inflorescence.

2–5-flowered, loosely compact;

primary bract usually longer than inflorescence.

Flowers

tepals yellow-brown with green midstripe, lanceolate, 5–6.5 mm, margins clear;

outer and inner series nearly equal, adaxially papillose;

stamens 6, filaments 0.5–1 mm, anthers 1.8–2.6 mm;

style 0.6 mm.

pedicellate;

tepals brown to chestnut brown with green midstripe, lanceolate or widely so, (4–)5–8 mm, margins clear;

inner series loosely subtending capsule at maturity, shorter;

stamens 6, filaments 0.7–1 mm, anthers 1.1–1.6 mm;

style 0.2 mm.

Capsules

tan, 3-locular, obovoid, 3–5 mm, shorter than perianth.

brown to chestnut brown, 3-locular, oblate, 4.5–7(–8) × 1.8–2.2 mm, nearly equal to or exceeding perianth.

Seeds

ovoid, body 0.5–0.7 mm, tails 0.2–0.4 mm.

amber, body oblate, 0.5–0.6 mm.

Juncus howellii

Juncus drummondii

Phenology Flowering and fruiting summer. Flowering and fruiting summer.
Habitat Moist ground in mountain meadows Exposed slopes, stream banks, and meadows in montane and alpine areas
Elevation 850–2500 m (2800–8200 ft) 1600–4000 m (5200–13100 ft)
Distribution
from FNA
CA; ID; OR; WA
[WildflowerSearch map]
[BONAP county map]
from FNA
AK; AZ; CA; CO; ID; MT; NM; NV; OR; UT; WA; WY; AB; BC; NT; YT
[WildflowerSearch map]
[BONAP county map]
Discussion

Plants with capsules distinctly longer than the perianth have been referred to as Juncus drummondii var. subtriflorus. Those plants frequently occur sympatrically with J. drummondii (strict sense) through most of its range, leaving considerable doubt as to the value of recognizing such variation.

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

Source FNA vol. 22. FNA vol. 22.
Parent taxa Juncaceae > Juncus > subg. Graminifolii Juncaceae > Juncus > subg. Genuini
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. hemiendytus, 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. 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. compressus var. subtriflorus, J. drummondii var. longifructus, J. drummondii var. subtriflorus, J. subtriflorus, J. pauperculus
Name authority F. J. Hermann: Leaflets of Western Botany 5: 182. (1949) E. Meyer: in C. F. von Ledebour, Flora Rossica 4: 235. (1853)
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