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Petalostemon microphyllus

Comprehensive Description

provided by North American Flora
Petalostemon microphyllus (T. & G.) A. Heller, Bull Torrey Club 26: 593. 1899.
Petalostemon phleoides microphyllus T. & G. Fl. N. Am. 1 : 310. 1838. Ktthnistera microphylla A. Heller, Bull. Torrey Club 23: 122. 1896.
A perennial, branched at the woody base; stems erect or ascending, 2-6 dm. high, grooved or striate, more or less pilose, often branched; leaves very numerous, 3-5 cm. long, spreading or ascending; stipules subulate; leaflets 25-37, oblong or oblong-cuneate, 4-6 mm. long, emargiate, conspcuously glandular-dotted beneath, more or less pilose or in age glabrate; spikes dense, cylindric, in fruit 8 mm. thick, 2-5 cm. long; bracts linear-lanceolate, densely pubescent, with long subulate tips, persistent, longer than the calyces; calyx 2.5-3 mm. long; tube oblique, gibbous above, densely pubescent; lobes very short, the lower three triangular-ovate; corolla white; blade of the banner cordate, 2 mm. long, 3 mm. wide, the claw 3 mm. long; blades of the other petals linear-oblanceolate, 3 mm. long, the claws 2 mm. long; pod 2-2.5 mm. long, obliquely and very broadly obovoid, pubescent, the beak at right angles to the axis.
Type locality: Texas. Distribution: Texas.
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bibliographic citation
Per Axel Rydberg. 1919. (ROSALES); FABACEAE; PSORALEAE. North American flora. vol 24(1). New York Botanical Garden, New York, NY
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