Parrya |
Parrya rydbergii |
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parrya |
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Habit | Perennials [subshrubs]; (caudex well-developed, often covered with persistent petiolar remains or leaves); scapose [not scapose]; glandular or eglandular, glabrous [pubescent]. | Plants densely cespitose, caudex branched; densely glandular or, rarely, eglandular. | ||||||||||||
Stems | erect, unbranched. |
(0.3–)0.5–1.5(–2.6) dm. |
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Leaves | basal [sometimes cauline]; rosulate; petiolate; blade margins entire, subentire, or dentate [pinnately lobed]. |
petiole (0.5–)1.5–5(–7) cm, to 5 mm wide at base; blade obovate to spatulate or broadly oblanceolate to lanceolate, (1–)2–5(–8) cm × (7–)13–26mm, base cuneate or attenuate, margins incised to coarsely dentate, apex acute. |
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Racemes | (corymbose, 3–20-flowered, rarely proximalmost flowers bracteate), considerably elongated in fruit. |
3–15-flowered. |
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Flowers | sepals ovate or oblong [linear], (unequal, glandular or eglandular); petals purple, lavender, or white [pink], obovate, claw differentiated from blade, (subequaling or longer than sepals, apex rounded or emarginate); stamens tetradynamous; filaments dilated or not basally; anthers oblong [linear], (apex obtuse); nectar glands lateral, annular or semi-annular. |
sepals oblong, 5.5–9 × 1.5–2.5 mm; petals lavender to purple, (15–)16–20(–23) × 7–9 mm, claw 8–12 mm, apex emarginate; median filaments 4–6 mm; anthers 1.5–2 mm. |
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Fruiting pedicels | ascending or divaricate-ascending [erect]. |
(proximalmost) 4–15(–20) mm. |
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Fruits | sessile or shortly stipitate (gynophore persistently attached to pedicel), not segmented, linear, oblong, or lanceolate, smooth or torulose, strongly latiseptate or, rarely, subterete or 4-angled; valves (leathery), each with prominent midvein and with obscure to distinct lateral and marginal veins, eglandular or glandular; replum almost always flattened (visible); septum complete; ovules 6–20[–50] per ovary; stigma conical or cylindric, 2-lobed (lobes prominent, connate, decurrent). |
narrowly oblong to linear-lanceolate, (2–)3–5 cm × 5–7 mm; valves densely glandular; ovules 10–16 per ovary; style 0.5–1.5 mm. |
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Seeds | often broadly winged, suborbicular to broadly ovate [oblong], strongly flattened; seed coat (smooth), not mucilaginous when wetted; cotyledons accumbent. |
4–5 × 3.5–4.5 mm; wing 1–2 mm wide. |
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x | = 7. |
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Parrya |
Parrya rydbergii |
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Phenology | Flowering late Jun–Jul. | |||||||||||||
Habitat | Barren rock slides, alpine tundra, finely divided limestone rubble, calcareous talus, shale slopes, alpine rocky slopes, crevices among boulders | |||||||||||||
Elevation | 2900-3700 m (9500-12100 ft) | |||||||||||||
Distribution |
North America; Asia (w China, Himalayas, Russian Far East, Siberia) |
UT; WY |
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Discussion | Species 25–30 (4 in the flora). Parrya is a distinctive genus reduced by V. P. Botschantzev (1972) to being monospecific, including only P. arctica, with almost all of the other species transferred to Neuroloma. Except for the four North American species, the genus is centered in central Asia, adjacent western China, and the Himalayas. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Parrya rydbergii, which is restricted to Uinta and Emmons mountains in Utah (Daggett, Duchesne, Summit, and Uintah counties) and Beartooth and Big Sheep mountains in Wyoming (Park and Sublette counties), was treated by E. Hultén (1971) as a subspecies of P. nudicaulis and reduced by R. C. Rollins (1993) to synonymy of that species. It is geographically disjunct from P. nudicaulis and can be easily distinguished from that nearest relative. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 7, p. 511. | FNA vol. 7, p. 513. | ||||||||||||
Parent taxa | ||||||||||||||
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Synonyms | Achoriphragma, Neuroloma | P. platycarpa, Neuroloma rydbergii, P. nudicaulis subsp. rydbergii, P. nudicaulis var. rydbergii | ||||||||||||
Name authority | R. Brown: Chlor. Melvill., 10, plate B. (1823) | Botschantzev: Bot. Mater. Gerb. Bot. Inst. Komarova Akad. Nauk S.S.S.R. 17: 178. (1955) | ||||||||||||
Web links |