Flora of North America species comparison

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Juncus covillei var. covillei

Juncus covillei
Photo is of parent taxon

Coville's rush

Coville's rush
Habit Herbs, perennial, strongly rhizomatous, 0.5–2.5 dm.
Culms

erect, slightly flattened.
Leaves

basal 2–5, cauline 2–4;

auricles absent or, if present, 0.5–1.5 mm, apex acute;

blade flat, 5–15 cm × 2–3 mm.
Inflorescences

glomerules, 1–6, each with 3–7 flowers, open to aggregate, 2–6 cm;

primary bract or distal leaves usually exceeding inflorescences.
Flowers

tepals usually brown, ovate-oblong, 3–4 mm, margins scarious;

inner series slightly shorter, minutely papillate;

stamens 6, filaments 0.8–1.4 mm, anthers 0.8–1.4 mm;

style 1 mm.
Perianth

dark brown, apex of inner series rounded.

Capsules

dark brown, 1 mm longer than perianth.

3-locular, narrowly ovoid, 4–5 mm.
Seeds

narrowly ovoid, 0.3 mm, not tailed.
2n

= 36.

Juncus covillei var. covillei

Juncus covillei
Phenology Flowering and fruiting summer–early fall.
Habitat Wet areas along lakes, streams and rivers, especially on spray areas or occasionally flooded outcrops, coastal to low montane areas
Elevation below 300 m (below 1000 ft)
Distribution
from FNA
CA; ID; MT; OR; WA; BC; Asia (Japan); Pacific Islands (Kuriles)
from FNA
CA; ID; MT; OR; WA; BC; Coastal to montane areas
[WildflowerSearch map]
[BONAP county map]
Discussion

Varieties 2 (2 in the flora).

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Key
1. Perianth dark brown, apex of inner series rounded; capsule dark brown, 1 mm longer than perianth
var. covillei
1. Perianth pale brown, apex of inner series acute to obtuse; capsule pale brown, barely exceeding perianth
var. obtusatus
Source FNA vol. 22. FNA vol. 22.
Parent taxa Juncaceae > Juncus > subg. Graminifolii > Juncus covillei Juncaceae > Juncus > subg. Graminifolii
Sibling taxa
J. covillei var. obtusatus
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. 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
Subordinate taxa
J. covillei var. covillei, J. covillei var. obtusatus
Synonyms J. falcatus var. paniculatus, J. falcatus var. prominens, J. latifolius var. paniculatus, J. prominens J. falcatus var. paniculatus
Name authority unknown Piper: Contributions from the U. S. National Herbarium 11: 182. (1906)
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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