Seed Study - Sporobolus cryptandrus

Sporobolus cryptandrus - Sand Dropseed
Sporobolus cryptandrus - Sand Dropseed

NPS Graphic

Species: Sporobolus cryptandrus
Common name: sand dropseed

Vegetative identification: Growth is decumbent. Leaves are concave, wide, short, smooth and dark green in color. Leaf tips are often inrolled. There is a conspicuous ring of long hairs at the collar, giving the plant the look of wearing an Elizabethan collar.

Picture of Sporobolus cryptandrus - Sand Dropseed

NPS Photo


Sporobolus cryptandrus – sand dropseed
Average number of good seeds per gram bulk matter: 4040
Average number of good seeds per gram cleaned: n.m.
Commercial estimates of seeds per gram: 3876
Percent seed: 90.6
Percent live: 84
Collection dates: September 2 and 7
Collection effort: 12 grams in 4 person hours
Collection notes: Large numbers of seeds can be collected in a short amount of time from one plant, but seed producing plants are not common (at least not in 2004). The seed drops within a couple of days after maturing so timing is critical for successful collection.
Cleaning notes: As picked with empty seeds and a few rachises.

Last updated: April 10, 2015

Contact the Park

Mailing Address:

26611 US Highway 385
Hot Springs, SD 57747


(605) 745-4600

Contact Us