• Wind Cave National Park - Two Worlds

    Wind Cave

    National Park South Dakota

Seed Study - Calylophus serrulatus

Species: Calylophus serrulatus
Common name: yellow evening primrose


Calylophus serrulatus – yellow evening primrose
Average number of good seeds per gram bulk matter: n.m.
Average number of good seeds per gram cleaned: 872 (514)
Commercial estimates of seeds per gram: n.a.
Percent seed: n.m.
Percent live: n.m.
Collection dates: September 8 and 9.
Collection effort: 2 grams in 2 person hours
Collection notes: Difficult to collect because the widely scattered populations are hard to find. After maturing the pods burst open and most of the seeds fall quickly. Manually removing the seed from the pods is quite time consuming, the pods are tough and stringy and part of the seed is persistent to them.
Cleaning notes: Clean seed was out of the pods but with lots of chaff. The fingernail test seems to destroy good seed.

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