Thursday, February 16, 2017

Oenothera xylocarpa (Sierra Evening Primrose)

  7/2/16 Trail to Horseshoe Meadow, 10,000' elevation, Lone Pine Region,
Eastern Sierra, Inyo National Forest, Inyo County, CA

 7/2/16 Trail to Horseshoe Meadow


COMMON NAME: Sierra Evening Primrose

SPECIES: Oenothera xylocarpa

FAMILY: Onagraceae (Evening Primrose Family)

LIFE LIST DATE: 7/2/2016

LOCATION: 10,000' elevation, trail to Horseshoe Meadow, Lone Pine Region, Inyo National Forest, Eastern Sierra, Inyo County, CA 


Treatment from Jepson eFlora:

Habit: Perennial herb, rosetted, gray-green; hairs short (on flower long, coarse), erect; taproot fleshy. 

Stem: 0. 

Leaf: main segment +- round to oblanceolate, 26--62 mm; lobes few, generally small. 

Inflorescence: flowers in axils. 

Flower: hypanthium 27--45(55) mm; sepals 25--30 mm, tips not free in bud; petals 25--38 mm, yellow fading deep salmon-red. 

Fruit: 35--90 mm, 7--11 mm wide, narrowly lanceolate, curved, twisted, wrinkled. 

Seed: in 1 row (or near base 2 rows) per chamber, 2.4--3.2 mm, obovate; tip generally truncate, coarsely wrinkled, papillate; 1 side with 2 small ridges. 

Ecology: Gravelly to pumice meadows, Jeffrey-pine or lodgepole-pine/fir forests; 

Elevation: 2200--3100 m. 

Bioregional Distribution: c&s SNH; 

Distribution Outside California: western Nevada. 

Flowering Time: Jul--Aug 

Note: Generally cross-pollinated. Locally common. 

eFlora Treatment Author: Warren L. Wagner & Peter C. Hoch, family description, key to genera; treatment of genera by Warren L. Wagner

No comments:

Post a Comment