Boechera quebecensis |
|
---|---|
|
|
Habit | Biennials or perennials; short-lived; apomictic; caudex present or absent. |
Stems | usually 1 per caudex branch, arising from center of rosette near ground surface, 1–4.5 dm, densely pubescent proximally, trichomes sessile, 2–4-rayed, 0.15–0.5 mm, glabrous distally. |
Basal leaves | blade oblanceolate, 5–15 mm wide, margins denticulate, ciliate proximally, trichomes (simple), to 1 mm, surfaces moderately pubescent, trichomes subsessile, (2- or) 3–7-rayed, 0.1–0.3 mm. |
Cauline leaves | 4–15, not concealing stem; blade auricles 1–3.5 mm, surfaces of distalmost leaves glabrous. |
Racemes | 11–41-flowered, usually unbranched. |
Flowers | divaricate at anthesis; sepals pubescent; petals white, 6–7 × 1–2 mm, glabrous; pollen spheroid. |
Fruiting pedicels | horizontal to slightly descending, curved to straight, 3–8(–14) mm, glabrous or with some subappressed, branched trichomes. |
Fruits | horizontal to slightly descending, not appressed to rachis, secund, straight, edges parallel, 3–6 cm × 1.5–2 mm; valves glabrous; ovules 56–94 per ovary. |
Seeds | uniseriate, 1.2–1.5 × 1–1.3 mm; wing continuous, 0.1–0.15 mm wide. |
Boechera quebecensis |
|
Phenology | Flowering Jun–Jul. |
Habitat | Calcareous rock outcrops and talus slopes |
Elevation | 0-300 m (0-1000 ft) |
Distribution |
QC |
Discussion | Morphological evidence suggests that Boechera quebecensis is an apomictic species that arose through hybridization between B. holboellii and B. stricta; it is most likely to be confused with B. grahamii (see M. D. Windham and I. A. Al-Shehbaz 2007b for detailed comparison). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 7, p. 401. |
Parent taxa | |
Sibling taxa | |
Synonyms | Arabis divaricarpa var. dechamplainii |
Name authority | Windham & Al-Shehbaz: Harvard Pap. Bot. 12: 246. (2007) |
Web links |