Sagina maxima |
Sagina saginoides |
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coastal pearlwort, fleshy pearlwort, stick-stem pearlwort, sticky-stem pearlwort, thick-stem pearlwort |
alpine pearlwort, arctic pearlwort, sagine des alpes |
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Habit | Plants annual or perennial, tufted, glabrous or glandular-pubescent. | Plants perennial, tufted or becoming cespitose in alpine habitats, glabrous. | ||||
Stems | spreading to decumbent or procumbent, much-branched, stout, rarely filiform, distal portion glandular-pubescent. |
ascending or sometimes procumbent, few- to many-branched, not filiform. |
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Leaves | axillary fascicles absent; basal rosette or tuft of ascending leaves usually present; basal blades linear, 10–30 mm, succulent, apex apiculate, glabrous; cauline leaves conspicuously connate basally, forming shallow, scarious cup, blade linear, fleshy, apex apiculate, glabrous; proximal blades 6–15(–20) mm, distal blades rarely subulate, (2.5–)3.5–7(–9) mm. |
axillary fascicles absent; basal frequently in primary and secondary rosettes 9–45 mm diam., blade linear, 10–20 mm, not succulent, apex apiculate, rarely aristate, glabrous; cauline not conspicuously connate basally, rarely forming inflated cup in cespitose, alpine plants, blade linear, sometimes linear-subulate in cespitose plants, 4–20(–25) mm, not fleshy, apex apiculate, glabrous. |
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Pedicels | slender to stout, glabrous or glandular-pubescent distally. |
frequently recurved during capsular development, erect in fruit, filiform, glabrous. |
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Flowers | axillary, 5-merous; calyx bases glabrous or glandular-pubescent; sepals ovate to orbiculate, (2–)2.5–3.5 mm, hyaline margins whitish, occasionally purple tinged on margins or apex, apex obtuse to rounded, glabrous or glandular-pubescent, remaining appressed following capsule dehiscence; petals elliptic to nearly orbiculate, (1.5–)2–2.5(–3) mm, shorter than sepals; stamens 10. |
axillary or terminal, 5-merous, very rarely some 4-merous; calyx base glabrous; sepals elliptic, 2–2.5 mm, hyaline margins white, rarely purple in alpine specimens, apex obtuse to rounded, remaining appressed following capsule dehiscence; petals elliptic, (1–)1.5–2 mm, shorter than or equaling sepals; stamens (5 or) 10. |
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Capsules | (3–)3.5–4.5 mm, exceeding sepals, dehiscing ca. 1/4 length. |
2.5–3(–3.5) mm, 1.5–2 times sepals, dehiscing to base. |
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Seeds | reddish brown, reniform with abaxial groove absent, plump, 0.5 mm, smooth or slightly pebbled. |
brown, obliquely triangular with distinct abaxial groove, 0.3–0.4 mm, smooth to slightly pebbled. |
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2n | = 22. |
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Sagina maxima |
Sagina saginoides |
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Phenology | Flowering mid-late summer. | |||||
Habitat | Montane sites, open or light shade, wet places on lake margins, along stream gravels and seepages in rock ledges and roadcuts, subalpine and alpine zones | |||||
Elevation | 1000-4000 m (3300-13100 ft) | |||||
Distribution |
AK; CA; OR; WA; BC; e Asia
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AK; AZ; CA; CO; ID; MT; NM; NV; OR; UT; WA; WY; AB; BC; NF; NT; NU; QC; YT; Mexico; Greenland; Eurasia
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Discussion | Subspecies 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Some specimens from alpine habitats in Montana and Alberta are intermediate between Sagina saginoides and the typically arctic S. nivalis. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 5, p. 146. | FNA vol. 5, p. 142. | ||||
Parent taxa | Caryophyllaceae > subfam. Alsinoideae > Sagina | Caryophyllaceae > subfam. Alsinoideae > Sagina | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Spergula saginoides, S. linnaei, S. micrantha, S. saginoides var. hesperia | |||||
Name authority | A. Gray: Mem. Amer. Acad. Arts, n. s. 6: 382. (1858) | (Linnaeus) H. Karsten: Deut. Fl., 539. (1882) | ||||
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