Wooton's Holdback

Larrea wootonii Britton, sp. nov
Sufifrutescent, branched, about 4 dm. high, the branches, petioles, rachis and inflorescence densely short-pubescent and with black, sessile glands. Stipules nearly filiform, pubescent, about 5 mm. long; pinnae 5; leaflets 4 or 5 pairs, oblong-elliptic, 5-6.5 mm. long, pubescent on both sides, copiously black-glandular-dotted beneath; racemes 6-9 cm. long, several-flowered; fruiting pedicels 5-7 mm. long; flower-buds pubescent and black-glandular; legume obliquely oblong, about 1.5 cm. long and 6 mm. wide, densely short-pubescent and blackglandular-dotted, without marginal processes.
Chamal, Tamaulipas, June 25, 1919, E. 0. Wooton.

Perennial, Shrubs, Woody throughout, Stems or branches arching, spreading or decumbent, Stems less than 1 m tall, Stems solid, Stems or young twigs sparsely to densely hairy, Leaves alternate, Leaves petiolate, Stipules inconspicuous, absent, or caducous, Stipules setiform, subulate or acicular, Stipules deciduous, Stipules free, Stipules toothed or laciniate, Leaves compound, Leaves odd pinnate, Leaves bipinnate, Leaf or leaflet margins entire, Leaflets opposite, Leaflets alternate or subopposite, Leaflets 10-many, Leaves glandular punctate or gland- dotted, Leaves hairy on one or both surfaces, Inflorescences racemes, Inflorescence axillary, Inflorescence terminal, Bracts very small, absent or caducous, Flowers actinomorphic or somewhat irregular, Calyx 5-lobed, Calyx glabrous, Petals separate, Petals clawed, Petals red, Petals orange or yellow, Petals bicolored or with red, purple or yellow streaks or spots, Banner petal ovoid or obovate, Wing petals narrow, oblanceolate to oblong, Wing tips obtuse or rounded, Keel tips obtuse or rounded, not beaked, Stamens 9-10, Stamens completely free, separate, Filaments glabrous, Style terete, Fruit a legume, Fruit unilocular, Fruit freely dehiscent, Fruit oblong or ellipsoidal, Fruit exserted from calyx, Fruit glabrous or glabrate, Fruit gland-dotted or with gland-tipped hairs, Fruit 2-seeded, Fruit 3-10 seeded, Seeds ovoid to rounded in outline, Seed surface smooth, Seeds olive, brown, or black.