Gayophytum ramosissimum, branchy groundsmoke

Image Source -

Intermountain Flora
Plants glabrous, 1-4 dm tall, diffusely branched when well developed, very often without a distinct central axis, the branchlets often very slender; leaves linear or nearly so, up to about 4 cm long and 2.5 mm wide, reduced upwards; flowers very small and inconspicuous, adapted for self-pollination, often many of them (especially the later ones) cleistogamous, the pedicels slender, in fruit more or less elongate and about equaling or somewhat longer than the fruits, ascending to more often widely spreading or deflexed, the first flower usually 5-15 nodes above the base in well developed plants; sepals commonly about 1 mm long or a little less, sometimes up tp 1.3 mm; petals from a little shorter to a little longer than the sepals, rarely as much as 1.5 mm long; capsule notably short, thick-cylindric or clavate-cylindric, mostly 3-6 (9) mm long, more or less torulose; seeds mostly 6-16, 0.8-1.5 mm long, glabrous but often strongly papillate, not hairy, vertical or ascnding, tending to be crowded more or less into 2 rows in each locule; 2n = 14.

Cronquist, A., A.H., Holmgren, J.L., and Holmgren, P.K. (1997) "Intermountain Flora" pg. 226, vol. 3 part A, The New York Botanical Garden New York.