Comprehensive Description
provided by North American Flora
Larrea microphylla (Torrey) Britton
Hoffmanseggia microphylla Torrey, Bot. Mex. Boinid. Surv. 58. 1859. Caesalpinia virgata Fisher, Bot. Gaz. 18: 123. 1893.
A virgate shrub, up to 12 dm. high, the branches and racemes velvety-puberulent. Stipules ovate, acuminate, 3-4 mm. long; pinnae 3, the terminal one much longer than the lateral ones; lateral pinnae with 4—9 pairs of leaflets; terminal pinna with 7-13 pairs of leaflets; leaflets 2-3 mm. long, pubescent; racemes 1-6 dm. long, many-flowered; bracts lanceolate, pubescent, glandular on the margin, caducous; pedicels 3-7 mm. long; calyx pubescent, the lobes subimbricate, spreading or reflexed in age; petals not much longer than the sepals; vexillum eglandular; stamens pubescent; legume narrowly lunate, about 2 cm. long and 7 mm. wide, acute at both ends, pubescent and glandular.
Type locality: Colorado Desert, California.
Distribution: Southern Arizona and California to Sonora and Lower California.
- bibliographic citation
- Nathaniel Lord Britton and Joseph Nelson Rose. 1928. (ROSALES); MIMOSACEAE. North American flora. vol 23(1). New York Botanical Garden, New York, NY
