Comprehensive Description
(
englanti
)
tarjonnut North American Flora
Houstonia gracilis Brand. Zoe 5: 238. 1907
Perennial, from a stout vertical root, the stems erect or decumbent, 1-4 dm. long, slender, succulent, glabrous, sparsely branched, the internodes usually much longer than the leaves; stipules minute, setiferous; petioles slender, 2-4 mm. long; leaf-blades broadly ovate to lanceolate, 0.6-4 cm. long, 0.5-1.5 cm. wide, rounded to acutish at the base, subobtuse to attenuate at the apex, thin, bright-green, often scaberulous on the upper surface when young; flowers loosely cymose, the pedicels slender, 3-10 mm. long; hypanthium less than 1 mm. long, glabrous; calyx-lobes triangular, acute, equaling the hypanthium; corolla funnelform, purplish, 4-
5 mm. long, glabrous outside, the lobes ovate-oblong, obtuse, shorter than the tube, puberulent
within; capsule subdidymous, 1.5-2 mm. long, 2.5 mm. wide, subretuse, almost wholly inferior,
the free portion glabrous; seeds flat or concavo-convex, oval, about 0.5 mm. long, black,
minutely scrobiculate.
Type locality: On rocks near Orizaba, Veracruz. Distribution: Veracruz.
- bibliografinen lainaus
- Paul Carpenter Standley. 1918. RUBIALES; RUBIACEAE (pars). North American flora. vol 32(1). New York Botanical Garden, New York, NY
