Aphelandra madrensis Lindau

Aphelandra madrensis Lindau

Aphelandra madrensis Lindau, Bull. Herb. Boiss. II. 4:326. 1904.—Standley, Contrib. U.S. Nat. Herb. 23:1336. 1926.

Shrub 2–4 m high; branches glabrous to sparingly pubescent at tip; leaf blades oblong to ovate, 10–22 cm long, to 7 cm broad, obtusely acuminate, rather abruptly narrowed into the slender, winged petioles, 3–7 cm long, reticulately veined, entire or undulate, the upper surface glabrous to sparingly pubescent, the costa and lateral veins (10–12 pairs) more prominent on the lower surface, where they are plane or slightly elevated, and moderately pubescent chiefly on the costa and lateral veins; petioles (unwinged portion) about 2 cm long, glabrous to sparingly puberulent; spikes terminal, solitary or several, 10–15 cm long, 2 cm broad (excluding corollas), the rachis angular, densely glandular-pubescent; bracts closely imbricate or spreading with age, sometimes drying purplish red, ovate, 17 mm long, 8–9 mm wide, acuminate to acute, obscurely nerved, more or less glandularpuberulent both within and without, the margins entire, densely glandular pilose, especially the tip; bractlets linear-lanceolate, 10–13 mm long, 1–2 mm wide, aristate, carinate, striate-nerved, glandularpubescent without, glabrous within; calyx segments subequal, linear-lanceolate, aristate, prominently striate-nerved, glandular-puberulent, the posterior segment 12 mm long, 3.5 mm wide, the anterior and lateral pairs 13–15 mm long, 2–2.5 mm wide; corolla orange to red, puberulent, 3.5–4 cm long, the tube 2.8–3 cm long, 4 mm in diameter at base, enlarged to 7 mm at mouth, the upper lip erect, obovate, about 7 mm long and 6 mm wide, minutely 2-lobed or obcordate, the lower lip 3-lobed, the lobes all rounded, the middle lobe obovate, 10 mm long and 8 mm broad, the lateral lobes elliptic, 8 mm long and 5 mm broad; stamens exserted about 5 mm beyond mouth of the corolla tube; the filaments 25 mm long, glandular-pilose; the anthers truncate both apically and basally, 3–3.5 mm long, glabrous, united apically by long weak hairs; pollen grains typical, 45μ–55μ long, 30μ–38μ in diameter; staminode filiform, 2 mm long, pilose; style about 30 mm long, pilose; the stigma bifid, 1 mm long; capsule 1.5 mm long, 6 mm in diameter, shortly stipitate, puberulent.

TYPE.—E. Langlassé 806 (holotype B, destroyed, isotypes K, US), Mexico, Guerrero, Sierra Madre, 1600 m alt, 27 Jan 1899.

DISTRIBUTION.—Mexico, found usually in canyons along streams just above coastal areas in the states of Sinaloa, Jalisco, and Michoacán. MEXICO. SINALOA: Balboa, Jan 1923, Ortega 5023 (US). JALISCO: S of Puerto Vallarta, 26 Nov 1926, Mexia 1134 (US); Santa Cruz de Vallarta, 700 m alt, 9 Dec 1926, Mexia 1259 (US). MICHOACÁN: Coalcoman, Aquila, 300 m alt, 27 Oct 1941, Hinton 16042 (US); 3 Nov 1941, Hinton 16062 (K, NY, P, UC, US); Tizupan, 10 m alt, 9 Apr 1941, Hinton 15912 (US); S. Naranjillo, 25 Nov 1938, Hinto 12675 (K, US).

Aphelandra madrensis là một loài thực vật có hoa trong họ Ô rô. Loài này được Lindau mô tả khoa học đầu tiên năm 1904.