OregonFlora: Juncus supiniformis vs. Juncus parryi

	Juncus supiniformis	Juncus parryi
	hair-leaved rush, spreading rush	Parry's rush
Habit	Plants perennial, 3–50 cm tall, cespitose, forming mats if submerged, sometimes stoloniferous with stems trailing and rooting at nodes.	Plants perennial, 5–30 cm tall, cespitose.
Leaves	numerous; capillary, 0.2– 0.3 mm wide if aquatic; round; hollow, septate; auricles 0.8–2.1 mm.	with some terete; stem-like blades; distal sheaths 1–5 cm, light brown or redbrown.
Inflorescences	open, cymes of 2–9 clusters; clusters 2–5(12)-flowered, often bearing leafy bulblets.	a loose cluster of 1–3 flowers; inflorescence bracts erect and stem-like, often longer than inflorescence.
Flowers	tepals 6, 3.4–5.4 mm, brown; greenish or reddish; inner tepal margins usually inrolled; tips acuminate; stamens 3 or 6; filaments 0.8–1.5 mm; anthers 0.5–0.8 mm; styles 0.1–0.4 mm.	tepals 6, brown to dark brown; stamens 6; filaments 0.6–1 mm; anthers 1–1.6 mm; styles 0.3–0.6 mm.
Capsules	usually 1–1.5 mm longer than the tepals, brown to dark brown; without metallic gloss, 1-chambered.	6–9 mm; longer than or equaling the tepals, brown; apices acute to acuminate, 3-chambered.
Seeds	ellipsoid to ovoid, 0.6–1 × 0.2–0.3 mm, apiculate, striate.	(1.1)1.7–2.7 × 0.2–0.3 mm; bodies 0.6– 0.9 mm, striate; tails prominent; (0.3)0.4–0.9 mm.

	Juncus supiniformis	Juncus parryi
Distribution	[WildflowerSearch map] [BONAP county map]	[WildflowerSearch map] [BONAP county map]
Discussion	Shores, peatlands, marshes, wet dune hollows, often in shallow water. 0–1100 m. Est, Casc. CA, WA, north to AK. Native. Like introduced Juncus bulbosus, this species can bear bulblets in the inflorescence, and both are variable in habit depending on water levels. They differ in the shape of the tepal tips and length of the capsules. Juncus articulatus is similar but has blunter tepal tips and is common on disturbed wet ground.	Rocky slopes, scree, pumice, dry meadows, shores, ridgelines, open conifer forest, peatlands. 1100–2800m. BR, BW, ECas, Sisk, Casc. CA, NV, ID, WA; northeast to Alberta, southeast to NM. Native. This species is often confused with J. drummondii, which lacks leaf blades and sometimes is in slightly damper habitats.
Source	Flora of Oregon, volume 1, page 283 Peter Zika	Flora of Oregon, volume 1, page 282 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. tenuis, J. tiehmii, J. torreyi, J. triglumis, J. trilocularis, J. uncialis	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. patens, J. pelocarpus, J. planifolius, J. ranarius, J. regelii, J. saximontanus, J. supiniformis, J. tenuis, J. tiehmii, J. torreyi, J. triglumis, J. trilocularis, J. uncialis
Synonyms	Juncus oreganus
Web links	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	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

Juncus parryi

hair-leaved rush, spreading rush

Parry's rush

Habit

Plants perennial, 3–50 cm tall, cespitose, forming mats if submerged, sometimes stoloniferous with stems trailing and rooting at nodes.

Plants perennial, 5–30 cm tall, cespitose.

Leaves

numerous; capillary, 0.2– 0.3 mm wide if aquatic; round; hollow, septate;

auricles 0.8–2.1 mm.

with some terete; stem-like blades;

distal sheaths 1–5 cm, light brown or redbrown.

Inflorescences

open, cymes of 2–9 clusters; clusters 2–5(12)-flowered, often bearing leafy bulblets.

a loose cluster of 1–3 flowers;

inflorescence bracts erect and stem-like, often longer than inflorescence.

Flowers

tepals 6, 3.4–5.4 mm, brown; greenish or reddish;

inner tepal margins usually inrolled;

tips acuminate;

stamens 3 or 6;

filaments 0.8–1.5 mm;

anthers 0.5–0.8 mm;

styles 0.1–0.4 mm.

tepals 6, brown to dark brown;

stamens 6;

filaments 0.6–1 mm;

anthers 1–1.6 mm;

styles 0.3–0.6 mm.

Capsules

usually 1–1.5 mm longer than the tepals, brown to dark brown; without metallic gloss, 1-chambered.

6–9 mm; longer than or equaling the tepals, brown;

apices acute to acuminate, 3-chambered.

Seeds

ellipsoid to ovoid, 0.6–1 × 0.2–0.3 mm, apiculate, striate.

(1.1)1.7–2.7 × 0.2–0.3 mm;

bodies 0.6– 0.9 mm, striate; tails prominent; (0.3)0.4–0.9 mm.

Juncus parryi

Distribution

[WildflowerSearch map]

[BONAP county map]

[WildflowerSearch map]

[BONAP county map]

Discussion

Shores, peatlands, marshes, wet dune hollows, often in shallow water. 0–1100 m. Est, Casc. CA, WA, north to AK. Native.

Like introduced Juncus bulbosus, this species can bear bulblets in the inflorescence, and both are variable in habit depending on water levels. They differ in the shape of the tepal tips and length of the capsules. Juncus articulatus is similar but has blunter tepal tips and is common on disturbed wet ground.

Rocky slopes, scree, pumice, dry meadows, shores, ridgelines, open conifer forest, peatlands. 1100–2800m. BR, BW, ECas, Sisk, Casc. CA, NV, ID, WA; northeast to Alberta, southeast to NM. Native.

This species is often confused with J. drummondii, which lacks leaf blades and sometimes is in slightly damper habitats.

Source

Flora of Oregon, volume 1, page 283
Peter Zika

Flora of Oregon, volume 1, page 282
Peter Zika

Sibling taxa