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(Last Modified On 5/15/2013)
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(Last Modified On 5/15/2013)
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Species
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Schwenckia americana Royen ex L.
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PlaceOfPublication
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Gen. P1., ed 4. 577 [567]. 1764.
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Description
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Ascending herb, branched near the base to 70 cm tall; stems puberulent with antrorse curved hairs, leafy on the basal half. Leaves ovate, elliptic, obovate or rhombic, mostly 2 cm long and 7 mm broad, apically acute or obtuse, basally narrowed to the short, 2 mm petiole, pubescent and the midvein prominent on both sides, veins ca. 3 on each side. Inflorescence a scapose, open panicle, elongate, the stem leaves declining in size upward to become minute bracts near the apex; peduncles solitary, slender, to 24 cm long; pedicels solitary, 2-3 mm long, in fruit slightly longer with an articulation near the base. Flowers small, with the calyx tubular, 3 mm long, 4-5 lobed to about 1/3 the way down, strongly nerved, sparingly pubescent inside and out; corolla 10-12 mm long, narrowly tubular, glabrous outside, pubescent on the lower 1/3 inside, strongly nerved, minutely 5-lobed, the lobes deltoid and sometimes unequal, the nerves terminat- ing in 2-5, linear-spatulate, equal or unequal glandular appendages which may
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Habit
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herb
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Description
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slightly exceed the corolla lobes; stamens 2, equal, the filaments inserted about 1/3 the way up the corolla tube, pubescent on the lower 1/2 (including adnate portion), tape-like below, tapering just above the point of insertion, anthers connate, oblong, 1 mm long, dehiscing longitudinally, staminodes 3, equal, con- sisting of filaments which resemble those of the stamens for the adnate portion, tapering to an apex 1 mm above the point of insertion, the filaments of stamens and staminodes coherent by marginal hairs to form a closed cone over the ovary; ovary ellipsoidal, 2 mm long, constricted around the middle, the style straight, the stigma punctiform, exserted as long as the longest corolla appendage. Fruit a globose capsule with a small but manifest apicule, dehiscent by a single, elevated suture which transverses the apex, and sometimes (on herbarium sheets) by other longitudinal slits; seed 0.6 mm long, a pyramidal frustum, ferrugineous, minutely striate with tuberculate in rows.
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Note
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Only two collections of this species have been seen from Panama. There are more collections from Costa Rica and other Central American countries, but the species is apparently rare.
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Specimen
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COCLE: Nata', ca. 50 m, Allen 826 (F, MO, NY, US). Llanos, Penonome, Ebinger 994 (US). Aguadulce in savannas near sea level, Pittier 4880 (NY, US).
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