Senna covesii (A. Gray) H. S. Irwin & Barneby

Earleocassia covesii (A. Gray) Britton
Cassia Covesii A. Gray. Proc. Am. Acad. 7: 399. 1868.
Herbaceous, somewhat woody at base, 3-6 dm. high, velvety-pubescent throughout. Stipules linear, caducous; leaflets 2 or 3 pairs, oblong, or elliptic, 1-3 cm. long, apiculate; gland between the lower pair of leaflets narrow, elongated, pubescent; peduncles slender, mostly longer than the leaves, few-several-flowered; pedicels slender, 1-1.5 cm. long; sepals densely pubescent, 6-7 mm. long; petals 10-15 mm. long; legume 2-3.5 cm. long, 5-6 mm. wide, compressed, rather sparingly pubescent, subulate-tipped.
Type locality: Camp Grant and south to Prescott. .Arizona. DiSTRiBi'Tiox: Arizona. Nevada and California to Sonora and Sinaloa.

Perennial, Shrubs, Herbs, Stems woody below, or from woody crown or caudex, Taproot present, Stems erect or ascending, Stems or branches arching, spreading or decumbent, Stems less than 1 m tall, Stems solid, Stems or young twigs sparsely to densely hairy, Stems silvery, canescent, tomentose, cobwebby, or wooly, Leaves alternate, Leaves petiolate, Extrafloral nectary glands on petiole, Stipules inconspicuous, absent, or caducous, Stipules setiform, subulate or acicular, Stipules persistent, Stipules deciduous, Stipules free, Leaves compound, Leaves even pinnate, Leaf or leaflet margins entire, Leaflets opposite, Leaflets 4, Leaflets 5-9, Leaves hairy on one or both surfaces, Flowers in axillary clusters or few-floweredracemes, 2-6 flowers, Inflorescences racemes, Inflorescence axillary, Bracts ver y small, absent or caducous, Flowers actinomorphic or somewhat irregular, Calyx 5-lobed, Calyx glabrous, Petals separate, Petals orange or yellow, Stamens 9-10, Fertile stamens 6-8, Stamens heteromorphic, graded in size, Stamens completely free, separate, Filaments glabrous, Anthers opening by basal or terminal pores or slits, Style terete, Fruit a legume, Fruit stipitate, Fruit unilocular, Fruit freely dehiscent, Fruit elongate, straight, Fruit oblong or ellipsoidal, Fruit exserted from calyx, Fruit compressed between seeds, Fruit glabrous or glabrate, Fruit 11-many seeded, Seed with elliptical line or depression, pleurogram, Seeds ovoid to rounded in outline, Seed surface smooth, Seeds olive, brown, or black.

Senna covesii (lat. Senna covesii) - paxlakimilər fəsiləsinin səna cinsinə aid bitki növü.

Desert Senna flower, Water Ranch Riparian Preserve, Gilbert, Arizona.

Senna covesii (desert senna, Coues' senna, rattleweed, rattlebox, dais, or cove senna) is a perennial subshrub in the family Fabaceae, native to the Mojave Desert and Sonoran Desert in southeastern California, southern Nevada, and Arizona in the United States, and northern Baja California in Mexico. It is found on desert plains and in sandy washes between 500 and 600 m above sea level, and is very common in Joshua Tree National Park. The specific epithet honors ornithologist Elliott Coues.

It grows to 30–60 cm tall, and is leafless most of the year. The leaves are pinnate, 3–7 cm long, with two or three pairs of leaflets (no terminal leaflet); the leaflets are elliptical, 1.0-2.5 cm long. The flowers are yellow in color, with five rounded petals about 12 mm long.

This shrub is often planted by landscapers and as part of roadside wildflower programs. Flowers are visited by carpenter bees and bumblebees. Sulphur butterflies use the plant as a larval food source.

Senna covesii là một loài thực vật có hoa trong họ Đậu. Loài này được (A.Gray) H.S.Irwin & Barneby miêu tả khoa học đầu tiên.