Eastern Mojave Vegetation Coll. No. 1872, Arabis pycnocarpa  


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  Brassicaceae Arabis pycnocarpa
Photographed 12 November 2018.

Coll. No. 1872, 23 May 2018, characters observed: Annual or short-lived Perennial, terrestrial herb, to 60 cm. tall; Stem, erect, leafy, proximal hairs simple, distal glabrous; Leaves, basal and cauline, basal, simple, petiole, 10 mm., indistinct, blade 45 mm. × 10 mm. wide, oblanceolate, pinnately toothed, hairs, forked, not dolabriform, cauline, sessile, basally lobed, lanceolate, proximal leaves have a mix of simple and forked hairs, mid- to distal-leaves are glabrous, margin, entire; Inflorescence, raceme, 65 mm. × 15 mm. wide, not bracted, not secund; Flowers, radial; Pedicels, 3 mm.; Sepals, #4, rows 1, 4.2 mm. × 1.2 mm. wide, lanceolate, chartaceous, glabrous; Petals, 5 mm. × 1 mm. wide, somewhat spoon-shaped, margin entire, color, white to cream; Stamens, #6, 5.2 mm.; Filaments, plain; Anthers, 1 mm., exserted; Ovary, 5 mm. × 0.7 mm. wide; Stigma, capitate, 0.6 mm. wide, ±= width of ovary base (Welsh, 1993); Fruit, pedicels, 6 mm., ascending, nearly appressed, glabrous; mature, 12-16 mm. × 0.8 mm. wide, ascending, nearly appressed, not inflated, glabrous.

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Date and time this page was prepared: 6/16/2024 11:57:44 AM