Sinclairia glabra (Hemsl.) Rydb.

Sinclairia sublobata (B. L. Robinson) Rydberg
Liabum sublobatum B. L. Robinson, Proc. Am. Acad. 51: 539. 1916.
A shrub, with glabrous striate branches, brownish in the inflorescence; petioles about 5 cm. long, scarsely dilated at the base; leaf-blades rhombic-ovate, acuminate, somewhat hastately toothed at their broadest part, otherwise sharply mucronate-dentate, cuneate and decurrent at the base, green and glabrous above, rather loosely tomentose beneath, 1-1.3 dm. long, 7-9 cm. wide, 3-ribbed; panicle 1.5 dm. broad; branches minutely tomentose; heads discoid, about S-flowered; involucre about S mm. high and broad; bracts in four series, puberulent, the outer ovate, acutish, the inner oblong, rounded at the apex; corolla lightyellow, 8 mm. long, the lobes 2 mm. long; pappus-bristles about 6 mm. long, the outer squamellae less than 2 mm. long.
Type locality: San Lucas Toliman. Solola. Guatemala. Distribution : Guatemala and San Salvador.

Sinclairia glabra (Hemsl.) Rydberg
Liabum glabrum Hemsl. Biol. Centr. Am. Bot. 2: 232. 1881.
A shrub, up to 5 m. high, with glabrous thick branches; leaves opposite or verticillate in 3's; petioles 2-3 cm. long, glabrous; leaf-blades lanceolate or ovate, 5-15 cm. long, acuminate at the apex, cuneate at the base, denticulate, triple-ribbed, glabrous on both sides or slightly floccose beneath when young; inflorescence cymose-paniculate, ovoid in outline, with numerous beads; involucre turbinate, 8 mm. high, 8-10 mm. wide, glabrous; bracts imbricate in 3-5 series, striate, the outer ovate, acutish or obtuse, the inner linear, rounded at the apex, elongate; ray-flowers apparently wanting; disk-corollas 7-8 mm. long, the tube gradually expanding into the narrowly funnt-lform throat, the lobes linear-lanceolate, 2 mm. long, in age spreading or reflexed; achenes glabrous or slightly glandular-hispidulous, 10-ribbed; pappus-bristles about 20, scabrous-hispidulous, straw-colored, 5-6 mm. long, the outer squamellae 1 mm. long or less.
Type locality: Cuernavaca, Morelos.
Di m*irnoR Morelo* to Guatemala.

Sinclairia brachypus Rydberg, sp. nov
A shrub, with dark branches, slightly floccose when young; petioles 3-5 cm. long; leafblades about 1 cm. long, rhombic-lanceolate, acuminate at each end, glabrous above, whitetomentose beneath, denticulate; inflorescence dense, paniculate, pyramidal; branches short, ascending; heads discoid, 10-12-flowered; involucre about 7 mm. high, 7-8 mm. broad; bracts in 4 series, the outer ovate, short, the inner linear, obtuse; corollas 6 mm. long, the tube gradually widening into the throat; achenes sparingly hirsute; pappus-bristles brownish, barbellate, 5 mm. long.
Tvpe collected on the upper slopes of Volcan Ipala, Guatemala, January 1907, Pittier 1886 (U. S.Nat. Herb. no. 578282).

Sinclairia glabra là một loài thực vật có hoa trong họ Cúc. Loài này được (Hemsl.) Rydb. miêu tả khoa học đầu tiên năm 1927.