Anulocaulis eriosolenus (A. Gray) Standley

국표에 없다.

Herbs, stout or slender, short-lived perennial or annual. 

Stems 0.2-1.8 m. 

Leaves: 2-3 pairs near base; petiole 2-7 cm; blade broadly ovate to almost round, 2-11 × 2-13 cm, base shallowly cordate to ± truncate, apex rounded or obtuse, adaxial surface yellow-green, abaxial surface much paler, both surfaces sparsely villous-hispid with blackish based hairs. 

Flowers usually borne singly on branchlets of inflorescence; perianth 8-9 mm, tube white to pink or pale lavender [magenta], finely pubescent, limbs white to pink or pale lavender [magenta], gradually flared from tube; stamens 5, exserted 4-6 mm. 

Fruits bluntly 5-angled, turbinate, 2.6-3.8 × 2.4-3.4 mm, sometimes secreting mucilage (especially southern populations) when wetted; ribs 10, faint, linear; equatorial flange or ridge absent. 

2n = 24.

Flowering late spring-mid fall. Sandy, gravelly limestone outwash fans, or calcareous silty soils, gypsum; 600-1200 m; Tex.; Mexico (Chihuahua, Coahuila).

The perianth tube of Anulocaulis eriosolenus elongates two to seven times its length after the limb of the perianth wilts.

Anulocaulis eriosolenus in Flora of North America @ efloras.org

https://youtu.be/ZVEiPlt1k54