Greenman's Bluet

Houstonia parviflora Holz.; Greenman, Proc. Am. Acad. 32: 284
1897.
Diffuse annual, much branched, the branches slender, 1-10 cm. long, glabrous or scaberu-
lous, the internodes equaling or exceeding the leaves; stipules minute, naked; leaf-blades
linear or oblanceolate-linear, 5-10 mm. long, 2 mm. wide or narrower, acute at the apex,
attenuate at the base to a slender petiole half as long as the blade or shorter, glabrous; flowers
few or numerous, axillary, solitary, the slender pedicels 3-10 mm. long, erect or ascending;
hypanthium less than 1 mm. long, glabrous; calyx-lobes linear-oblong, acute, twice as long as
the hypanthium, in fruit longer than the capsule; corolla salverform, equaling or slightly
exceeding the calyx-lobes, white, glabrous, the lobes shorter than the tube, obtuse; anthers
included; capsule subdidymous, compressed, 2.5 mm. wide, about two thirds inferior; seeds
crateriform, 0.8 mm. long, dark-brown, scrobiculate.
Type locality: Round Rock, Texas. Distribution: Southeastern Texas.

Houstonia parviflora, the few-flowered bluet or Greenman's bluet, is a plant species in the Rubiaceae, found only in south-central Texas.