Juncus alpinoarticulatus |
Juncus luciensis |
|
---|---|---|
alpine rush, northern green rush, northern rush |
Santa Lucia dwarf rush, Santa Lucia rush |
|
Habit | Herbs, perennial, rhizomatous, 0.5–5 dm. | Herbs, annual, cespitose, 0.07–0.6 dm. |
Rhizomes | 2–4 mm diam., not swollen. |
|
Culms | erect, terete, 1–3 mm diam., smooth. |
to 160. |
Cataphylls | 0–1, straw-colored or maroon, apex acute. |
|
Leaves | basal 0–2, cauline 1–2(–5); auricles 0.5–1.2 mm, apex rounded, scarious; blade green to straw-colored, terete, 1.5–12 cm × 0.5–1.1 mm. |
to 1.5 cm × 0.1–0.3 mm. |
Inflorescences | terminal panicles of 5–25 heads, 3–11 cm, branches erect to ascending; primary bract erect; heads 2–10-flowered, obpyramidal, usually with some flowers short- pedicellateled, 2–6 mm in diam. |
1(–2) flowers; bracts subtending inflorescence 2, round to acutely ovate, inconspicuous, 0.4–1.6 mm, membranous. |
Flowers | tepals greenish to straw-colored, lanceolate to oblong; outer tepals 1.8–3 mm, apex obtuse, mucronate; inner tepals 1.6–2.7 mm, apex obtuse; stamens 6, anthers 1/2 filament length. |
tepals pale yellow-green until seeds ripen, tip darker, 1.6–3(–4.2) mm; ; outer and inner series nearly equal or outer slightly longer; stamens 2–3, filaments 0.6–0.9 mm, anthers 0.3–0.5 mm; style 0.2–0.4 mm, stigma 0.6–1.1 mm. |
Capsules | equaling perianth to usually exserted, chestnut brown to straw-colored, imperfectly 3-locular, oblong to oblong-ovoid, 2.3–3.5 mm, apex obtuse, valves separating at dehiscence. |
pale yellow-green to reddish tinged until seeds ripen, 3-locular, ovoid to ellipsoid, 1.3–2.9 × 0.9–1.6 mm. |
Seeds | oblong to ovoid, 0.5–0.7 mm, not tailed. |
globose-ovoid, 0.3–0.4 mm. |
n | = 16. |
|
2n | = 40. |
|
Juncus alpinoarticulatus |
Juncus luciensis |
|
Phenology | Fruiting mid summer–fall. | Flowering and fruiting spring-- to early summer. |
Habitat | Wet meadows, sandy and gravelly, often calcareous shores, fens, and clayey pools over rock | Wet sandy soil of seepage areas on sandstone, depressions in meadows, vernal pools, and streamsides |
Elevation | 0–2600 m (0–8500 ft) | 300–1900 m (1000–6200 ft) |
Distribution |
AK; CO; IA; ID; IL; IN; ME; MI; MN; MO; MT; ND; NE; NY; OH; PA; SD; UT; VT; WA; WI; AB; BC; MB; NB; NL; NS; NT; ON; PE; QC; SK; YT; Greenland; ; Eurasia
|
CA |
Discussion | Several attempts have been made to separate subspecies or varieties of this widespread and variable species. In one study, five varieties were recognized, with four in North America (B. Lindquist 1932) . In another, at least six subspecies were recognized with two in North America (L. Hämet-Ahti 1986). The variation we.have encountered does not fit nicely into the subspecies Hämet-Ahti has recognized, and until a full account of the variation throughout the range of the species is presented, we are not recognizing subspecific or varietal divisions of this species. Recent evidence suggests that this species may be one of the parents of the tetraploid Juncus articulatus. Juncus alpinus hybridizes with J. brevicaudatus (= J. × gracilescens J. Hermann), J. articulatus (= J. × alpiniformis Fernald), J. nodosus (= J. × nodosiformis Fernald), and J. torreyi (= JuncusJ. ×stuckeyi Reinking). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Juncus luciensis occurs in California in the Diamond and Santa Lucia mountains and the Transverse and Peninsular ranges. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 22, p. 254. | FNA vol. 22. |
Parent taxa | Juncaceae > Juncus > subg. Septati | Juncaceae > Juncus > subg. Graminifolii |
Sibling taxa | ||
Synonyms | J. alpinus, J.. alpinoarticulatus subsp. americanus, J.. alpinoarticulatus subsp. fuscescens, J.. alpinus var. americanus, J.. alpinus, J.. alpinus var. fuscescens, J.. alpinus var. insignis, J.. alpinus subsp. nodulosus, J.. alpinus var. rariflorus, J.. nodulosus, J.. rariflorus, J.. richardsonianus | |
Name authority | Chaix: in D. Villars, Hist. Pl. Dauphiné 1: 378. (1786) | Ertter: Memoirs of the New York Botanical Garden 39: 58, figs. 13c–e, 14. (1986) |
Web links |