OregonFlora: Juncus uncialis vs. Juncus torreyi

	Juncus uncialis	Juncus torreyi
	inch-high rush, twelfth rush	Torrey's rush
Habit	Plants annual, 0.3–3.5 cm tall, unbranched, stems not thickened below flowers.	Plants perennial, 30–100 cm tall, rhizomatous, rhizomes elongate, usually swollen or tuberous, at least at some nodes, perennial.
Leaves	capillary; basal.	round; hollow, septate, often stiff and divaricate; auricles 1–3.5 mm.
Inflorescences	1 terminal flower, subtended by solitary bractlet; base encircling stem; tip truncate.	1–23 dense head-like clusters; clusters globose with 26–80 flowers.
Flowers	tepals usually 6 (4 or 8), green or reddish; stamens (2)3; filaments 0.9–1.6 mm; anthers 0.3–0.5 mm; styles 0.1–0.3 mm.	tepals 6, brown; greenish or reddish; tips acuminate; stamens 6; filaments 0.6–1.2 mm; anthers 0.4– 0.8 mm; styles 0.1–0.2 mm.
Capsules	usually shorter than or equaling the tepals; (green) orange; reddish or dark purple and often darker than tepals.	equaling or longer than the tepals, pale brown to dark brown, gradually tapered to acuminate tips, 1-chambered.
Seeds	approximately 100–140 per capsule, 0.3–0.4 × 0.15–0.25 mm, sometimes faintly reticulate (at 10×), not striate.	ellipsoid to ovoid, 0.4–0.5 × 0.2–0.3 mm, apiculate.
2n	=32.	=40.

	Juncus uncialis	Juncus torreyi
Distribution	[WildflowerSearch map] [BONAP county map]	[WildflowerSearch map] [BONAP county map]
Discussion	Vernal pools, shores exposed by receding water, stony swales. 50–2700m. BR, Col, ECas, Sisk. CA, NV, WA. Native.	Shores, swales, springs, ditches. 50–1300m. BW, Col, Lava, Owy. CA, NV, ID, WA; across the US and southern Canada, south to Mexico. Native. This is primarily an eastern Oregon species, with large globose clusters, peculiar swollen rhizome nodes, and spreading stiff foliage.
Source	Flora of Oregon, volume 1, page 284 Peter Zika	Flora of Oregon, volume 1, page 284 Peter Zika
Sibling taxa	J. acuminatus, J. anthelatus, J. articulatus, J. balticus, J. bolanderi, J. brevicaudatus, J. breweri, J. bryoides, J. bufonius, J. bulbosus, J. canadensis, J. capillaris, J. capitatus, J. compressus, J. confusus, J. conglomeratus, J. covillei, J. diffusissimus, J. drummondii, J. dudleyi, J. effusus, J. ensifolius, J. ensifolius x Juncus nevadensis, J. exiguus, J. falcatus, J. filiformis, J. gerardi, J. hemiendytus, J. hesperius, J. howellii, J. inflexus, J. interior, J. kelloggii, J. laccatus, J. lescurii, J. longistylis, J. marginatus, J. mertensianus, J. mexicanus, J. nevadensis, J. occidentalis, J. orthophyllus, J. oxymeris, J. parryi, J. patens, J. pelocarpus, J. planifolius, J. ranarius, J. regelii, J. saximontanus, J. supiniformis, J. tenuis, J. tiehmii, J. torreyi, J. triglumis, J. trilocularis	J. acuminatus, J. anthelatus, J. articulatus, J. balticus, J. bolanderi, J. brevicaudatus, J. breweri, J. bryoides, J. bufonius, J. bulbosus, J. canadensis, J. capillaris, J. capitatus, J. compressus, J. confusus, J. conglomeratus, J. covillei, J. diffusissimus, J. drummondii, J. dudleyi, J. effusus, J. ensifolius, J. ensifolius x Juncus nevadensis, J. exiguus, J. falcatus, J. filiformis, J. gerardi, J. hemiendytus, J. hesperius, J. howellii, J. inflexus, J. interior, J. kelloggii, J. laccatus, J. lescurii, J. longistylis, J. marginatus, J. mertensianus, J. mexicanus, J. nevadensis, J. occidentalis, J. orthophyllus, J. oxymeris, J. parryi, J. patens, J. pelocarpus, J. planifolius, J. ranarius, J. regelii, J. saximontanus, J. supiniformis, J. tenuis, J. tiehmii, J. triglumis, J. trilocularis, J. uncialis
Web links	Local floras: CA, OR, WA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search	Local floras: BC, CA, OR, WA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search