Schoenolirion wrightii Sherman

Schoenolirion wrightii occurs in habitats similar to those of S. croceum in the Alabama plateau region and in the western part of its range.

Treatment of these white-flowered plants as a species distinct from Schoenolirion croceum is very tenuous; tepal color seems to be the only consistent difference between the two. At the time of the last systematic study of the genus (H. L. Sherman 1969), there seemed to be a significant difference in chromosome number between the two “color forms” (2n = 24 for S. wrightii and 2n = 30 or 32 for S. croceum). Since that time, one population of S. croceum with 2n = 24 has been found. In future treatments of the genus, S. wrightii may be considered to be a color form or variety of S. croceum.

Plants with prominent bulbs at tops of vertical rootstocks; bulbs ovoid to elongate, to 17 mm diam. Leaves 2–7, 14–34 cm × 2–6 mm, not withering to persistent fibers; blade flattened or somewhat keeled, usually shorter than scape and inflorescence, base fleshy. Inflorescences seldom branched; bracts mostly lanceolate-acuminate, sometimes ovate-obtuse. Flowers: tepals seldom strongly recurved, white, each with green abaxial stripe, mostly 3(–5)-veined, ovate to ovate-lanceolate, 4.4–6.5 mm, apex obtuse; ovary and style green. 2n = 24.

Ala., Ark., La., Tex.

Flowering late Mar--mid Apr in Texas, Arkansas; mid Apr--early May in Alabama; dormant by mid Jun.

Sandstone outcrops, moist pinelands, or boggy areas; 0--400m.

Schoenolirion wrightii, known as Texas sunnybell, is a species of flowering plant in the Agave subfamily. It is native to the southern United States, in Texas, Louisiana, Arkansas, and Alabama. Texas sunnybell produces vertical rootstocks topped with prominent bulbs, each up to 17 mm (0.67 in) in diameter. Between two and seven leaves are produced per plant, up to 34 cm (13 in) long and only 6 mm (0.24 in) across each, flattened to slightly keeled and usually shorter than the flowerhead. The ovate to lanceolate tepals are white with a green stripe on the back, mostly three-veined, but sometimes five-veined. Schoenolirion wrightii flowers between March and May, occurring in sandstone outcrops, wet pinelands, and boggy places.

Schoenolirion wrightii là một loài thực vật có hoa trong họ Măng tây. Loài này được Sherman miêu tả khoa học đầu tiên năm 1979.