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FNA | Family List | FNA Vol. 7 | Brassicaceae

49. Parrya R. Brown, Chlor. Melvill. 10, plate B. 1823.

[For William E. Parry, 1790-1855, arctic explorer during whose first expedition to the North American Arctic (1819-1820) specimens of the genus were first collected]

Ihsan A. Al-Shehbaz

Achoriphragma Soják; Neuroloma Andrzejowski ex de Candolle

Perennials [subshrubs]; (caudex well-developed, often covered with persistent petiolar remains or leaves); scapose [not scapose]; glandular or eglandular, glabrous [pubescent]. Stems erect, unbranched. Leaves basal [sometimes cauline]; rosulate; petiolate; blade margins entire, subentire, or dentate [pinnately lobed]. Racemes (corymbose, 3-20-flowered, rarely proximalmost flowers bracteate), considerably elongated in fruit. Fruiting pedicels ascending or divaricate-ascending [erect]. 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. 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). Seeds often broadly winged, suborbicular to broadly ovate [oblong], strongly flattened; seed coat (smooth), not mucilaginous when wetted; cotyledons accumbent. x = 7.

Species 25-30 (4 in the flora): North America, Asia (w China, Himalayas, Russian Far East, Siberia).

Selected reference Botschantzev, V. P. 1972. On Parrya R. Br., Neuroloma Andrz. and some other genera (Cruciferae). Bot. Zhurn. (Moscow & Leningrad) 57: 664-673.

1 Sepals 2.5-3.5 mm; petals 6-7 mm, apex rounded; ovules 6-8 per ovary; fruits obovate to oblong, 0.8-1.4(-1.7) cm.   1 Parrya nauruaq
+ Sepals (3-)4-9 mm; petals (8-)10-23 mm, apex emarginate; ovules 10-20 per ovary; fruits narrowly oblong to linear-lanceolate, (1-)1.5-5 cm   (2)
2 (1) Plants eglandular; leaf blades linear-oblanceolate to narrowly oblanceolate, 2-5(-7) mm wide; sepals (3-)4-5 mm; petals (8-)10-13 × 3-5 mm, claws 3.5-4.5 mm; ovules 14-20 per ovary.   2 Parrya arctica
+ Plants glandular or eglandular; leaf blades obovate, spatulate, broadly oblanceolate, lanceolate, or oblong, (6-)10-28 mm wide; sepals 5-9 mm; petals (14-)16-23 × 7-12 mm, claws 6-12 mm; ovules 10-16 per ovary   (3)
3 (2) Plants glandular or eglandular, not cespitose; leaf blade margins entire, minutely to coarsely dentate, or, rarely, incised; fruiting pedicels (10-)15-40(-60) mm; filaments 6-10 mm; Alaska, British Columbia, Northwest Territories, Yukon.   3 Parrya nudicaulis
+ Plants usually densely glandular, rarely eglandular, densely cespitose; leaf blade margins incised to coarsely dentate; fruiting pedicels 4-15(-20) mm; filaments 4-6 mm; Utah, Wyoming.   4 Parrya rydbergii

Lower Taxa


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