Houstonia prostrata Brandegee

Houstonia prostrata Brand. Zoe 5 : 105. 1901
Houstonia parvula Brand. Zoe 5: 221. 1905.
Depressed or prostrate annual, much branched, the branches slender, 2-8 cm. long, glabrous but minutely whitish-papillose, the internodes longer or shorter than the leaves; stipules minute, usually sparsely setiferous; leaves opposite, sessile, or the lowest short-petiolate, the blades linear or linear-oblanceolate, 5-12 mm. long, 0.6-2 mm. wide, obtuse or acute, glabrous, papillose on the upper surface, 1 -nerved, the margins often re volute; flowers axillary, the pedicels stout, much shorter than the capsules, recurved after anthesis; hypanthium less than 1 mm. long, glabrous; calyx-lobes lance-oblong, acutish, about as long as the hypanthium; corolla funnelform, purplish-white, only slightly exceeding the calyx-lobes, glabrous outside; capsule subdidymous, 2.5-3 mm. broad, about three fourths inferior, minutely papillose; seeds cymbiform, 1.5 mm. long, black.
Type locality: Near La Palma, Lower California.
Distribution: On sand or gravel beds, Sinaloa and the Cape Region of Lower California.

Houstonia prostrata là một loài thực vật có hoa trong họ Thiến thảo. Loài này được Brandegee mô tả khoa học đầu tiên năm 1901.