Sunday, July 16, 2017

Boechera inyoensis (Inyo Rock Cress)

8/18/11 Whitney Portal National Recreation Trail, Inyo National Forest, 
E. Sierra, Inyo County, CA


COMMON NAME: Inyo Rock Cress

SPECIES: Boechera (formerly Arabis) inyoensis

FAMILY: Brassicaceae (Mustard Family)


LOCATION: Creekside, bridge at Whitney Portal National Recreation trailhead. Lone Pine region, Eastern Sierras, Inyo National Forest, Inyo County, CA


Jepson eFlora:

Habit: Short-lived perennial herb; caudex not woody. 

Stem: generally 1 per caudex branch, from center of basal rosette at +- ground surface; generally 2.5--6.5 dm, proximally with short-stalked, 7--12-rayed hairs 0.1--0.2 mm. 

Leaf: basal 1--4(8) mm wide, entire; hairs short-stalked, 3--10-rayed, 0.2--0.7 mm; cauline (7)12--35, distal hairy, basal lobes 0.5--2 mm. 

Inflorescence: 10--65-flowered, not 1-sided in fruit; fruit pedicel spreading-ascending to horizontal, +- straight, 5--15 mm, hairs few, appressed, branched. 

Flower: sepals hairy; petals 5--8 mm, 1.2--2 mm wide, lavender to +- purple; pollen spheric. 

Fruit: spreading-ascending to widely pendent, not appressed, 3.7--6.5 cm, 1.5--2.2 mm wide, glabrous; style < 0.2 mm; ovules 74--134. 

Seed: in 2(1) rows, 1.7--2 mm; wing 0.1--0.2 mm wide. 

Ecology: Limestone, volcanic outcrops, clay soils, in desert scrub, pinyon/juniper woodland; 

Elevation: 1200--3500 m. 

Bioregional Distribution: e SNH, SNE, DMtns; 

Distribution Outside California: to Utah. 

Flowering Time: Apr--Jun 

Synonyms: Arabis inyoensis Rollins; Boechera selbyi (Rydb.) W.A. Weber var. inyoensis (Rollins) N.H. Holmgren

eFlora Treatment Author: Michael D. Windham & Ihsan A. Al-Shehbaz

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