Physaria calderi

(G. A. Mulligan & A. E. Porsild) O’Kane & Al-Shehbaz

Novon 12: 322. 2002.

Common names: Calder’s bladderpod
Basionym: Lesquerella calderi G. A. Mulligan & A. E. Porsild Canad. J. Bot. 47: 215, plate 1. 1969
Synonyms: Lesquerella arctica subsp. calderi (G. A. Mulligan & A. E. Porsild) Hultén
Treatment appears in FNA Volume 7. Treatment on page 629. Mentioned on page 619.

Perennials; caudex simple or branched; densely pubescent throughout, trichomes (sessile or subsessile), rays distinct or slightly fused at base, furcate or bifurcate, (strongly umbonate, tuberculate, tubercles often relatively larger, fewer over center). Stems simple or few to several from base, usually erect to spreading, sometimes prostrate, 0.5–2 dm. Basal leaves: blade oblanceolate, 2–3 cm, margins entire. Cauline leaves (sessile or proximal shortly petiolate); blade narrowly oblanceolate, 0.5–1.5 cm, margins entire. Racemes loose. Fruiting pedicels (erect to divaricate or ascending, sometimes curved), (5–)10–20(–40) mm, (stout). Flowers: sepals ovate to elliptic, (3–)4–5(–6) mm, (median pair often thickened apically, cucullate); petals obovate, (6–)7–10 mm (nearly as wide, abruptly narrowed to claw, ca. 1 mm wide). Fruits subglobose to ellipsoid, compressed (usually angustiseptate), to 8 mm; (valves not retaining seeds after dehiscence); replum as wide as or wider than fruit; ovules 10–14 per ovary; style 1–2 mm. Seeds plump. 2n = 20.

Phenology: Flowering Jun–Aug.
Habitat: Dry rocky summits, limestone flats and slopes, alpine knolls
Elevation: 600-1500 m


Physaria calderi is known from the Ogilvie and Richardson mountains.

Selected References


Lower Taxa

... more about "Physaria calderi"
Steve L. O’Kane Jr. +
(G. A. Mulligan & A. E. Porsild) O’Kane & Al-Shehbaz +
Lesquerella calderi +
Calder’s bladderpod +
N.W.T. +, Yukon +  and Alaska. +
600-1500 m +
Dry rocky summits, limestone flats and slopes, alpine knolls +
Flowering Jun–Aug. +
Lesquerella arctica subsp. calderi +
Physaria calderi +
Physaria +
species +