Cycladenia humilis

Herbs 6–12 cm. Leaves: petiole 5–30 mm, winged, glabrous or pubescent; blade ovate to sub­or­biculate, 3–7(–9.5) × 2–6.5 cm, thick-textured, base trun­cate to obtuse or cuneate, apex acute to obtuse, surfaces glabrous or densely pubescent, often glau­cous. Peduncles 2.5–6 cm, gla­brous or densely pubescent. Pedicels 7.5–12.5 mm, gla­brous or densely pubescent. Flowers: calyx lobes ovate-lanceolate to linear, 5–7.5 mm, glabrous or eglandular-pubescent; corolla sparsely eglandular-pubescent, glab­rous or eglandular-pubescent abaxially, glabrous or papillate adaxially, not clearly differentiated into tube and throat, 15–28 mm, lobes spreading, obovate-oblong, 4–9(–12) × 3–5 mm. Follicles 3.5–7 × 0.3–0.5 cm. Seeds 6–9 × 2.5–3.8 mm. 2n = 14.

Distribution

w United States.

Discussion

Varieties 3 (3 in the flora).

Three varieties of Cycladenia humilis are recognized based on morphological features and geographic distrib­ution; however, two unpublished studies (M. P. Last 2009; H. K. Brabazon 2015) have noted inconsistencies between the morphological and genetic data and suggest a need for further study.

Selected References

None.

Lower Taxa

Cycladenia humilis var. humilis, Cycladenia humilis var. jonesii, Cycladenia humilis var. venusta

Key

1	Corollas glabrous or tomentose with interwoven hairs abaxially, glabrous or papillate adaxially; n California, s Oregon.	Cycladenia humilis var. humilis
1	Corollas pubescent abaxially or marginally with hairs that are not interwoven, sparsely pubescent adaxially; n Arizona, c, s California, Utah.	> 2
2	Corolla lobes 4–5 mm.	Cycladenia humilis var. jonesii
2	Corolla lobes 8–12 mm.	Cycladenia humilis var. venusta