Vol. 43 No. 8 
BULLETIN 
OF THE 
TORREY BOTANICAL CLUB 
es ee 
AUGUST, 1916 
The development of the embryo sac and embryo of Cooperia 
Drummondii* 
MarGARET B, CHURCH 
(WITH PLATES 22 AND 23) 
_ The following study of the embryo sac and embryo of Cooperia 
Drummondii was undertaken with the idea that a further knowl- 
edge of the embryo sac of the Amaryllidaceae would doubtless 
be of value and interest, since little or no work of this kind has 
been attempted recently in connection with this family. 
The geographical range of Cooperia Drummondii extends from 
the prairies of southern Kansas southwest into northern Mexico 
and as far west as New Mexico. The leaves of a mature plant 
are glabrous, the very narrow grass-like blades arising from coated, 
subglobose bulbs which are six to eight inches below the surface 
of the ground. The roots are coarse and unbranched except when 
injured at the tip. The flower scape varies from pale green at the 
base to yellow at the perianth. Its veins are a distinct rose color. 
The flower at the time of opening is creamy white with the tips 
of the lobes of the salverform perianth sometimes rose-colored. 
It becomes pure white when in full bloom and on withering gradu- 
ally changes to deep dull rose. No difficulty was encountered 
in obtaining seed in the greenhouse from self-pollinated flowers. 
Cooperia Drummondit is popularly known as “Rain Lily,” 
because the flower scapes shoot up and bear blooms very rapidly 
[The BuLLETIN for July (43: 343-396. pl. 21) was issued August 12, 1916.] 
* Contribution from the Botanical Laboratory of Brown University. 
