1965 
Plants recently received, not yet available for distribution. 
COLVILLEA racemosa (Caesalpiniaceae) , 58460. From Port-of -Spain, 
Trinidad, British West Indies. Seeds presented by W. G. Freeman, Di- 
rector of Agriculture. This handsome tropical tree, believed to be 
native to East Africa, should be tested in southern Florida alongside 
the poinciana, to which it is related. It is said to reach 40 or 50 
feet in height. The pinnate leaves are 3 feet in length, and the 
brilliant scarlet, curiously shaped flowers are borne in drooping ra- 
cemes more than a foot long. The tree was named for Sir Charles Col- 
ville, Governor of Mauritius; it was discovered in 1824 on the west 
coast of Madagascar, where it flowers in April or May. 
In all probability, it will 6tand no more frost than the poinciana. 
Like most other leguminous trees, it is readily propagated from seeds. 
Since it is not yet commonly cultivated in tropical America, it is recom- 
mended for trial in Porto Rico, Cuba, the Canal Zone and elsewhere. 
corokia virgata (Cornaceae), 58607. From Elstree, Herts, Eng- 
land. Seeds presented by Hon. Vicary Gibbs, Aldenham House Gardens. A 
slender-branched shrub, 6 to 12 feet high, native to the most northern 
part of New Zealand, where mild weather prevails throughout the year. 
The shining-green, oblong-spa tulate leaves are downy white beneath, and 
the yellow blossoms, about half an inch across, are in 3-f lowered clus- 
ters. 
dioscorea spp. (Dioscoreaceae) . From Mayaguez, Porto Eico. Tubers 
presented by T. B. McClelland, horticulturist, Porto Eico Agricultural 
Experiment Station. 
58625. DIOSCOREA CAYENENSIS. Yellow Guinea yam. "Congo." Accord- 
ing to C. F. Kinman, who studied the yams of Porto Eico exhaustively, 
this variety is called "congo amarillo" (yellow congo) at Mayaguez and 
"yellow guinea" at San Juan. It thrives much better in sandy soil than 
most other varieties, and the large cylindrical roots attain a length 
of one foot and a weight of 4 to 5 pounds in favorable seasons. The 
interior is light yellow, and turns dark brown when exposed to the air. 
It is more evenly grained than most of the water yams; indeed it is not 
less smooth than the white guinea or the potato yam. When cooked, it 
is deep yellow and of good texture. The flavor is pleasant, and satis 
factorily rich. The vines are small and very strong, moderately vigor- 
ous in growth, and the stems not angled as in some others. The variety 
is of interest for testing in the South, where the establishment of 
yams from all parts of the world is now receiving consideration. 
58626. DIOSCOREA ROTUNDATA. White Guinea yam. "' Guinea yam. ' A 
white-fleshed yam of excellent quality, and one of the most popular 
varieties grown in Porto Eico. The tubers are usually cylindrical, 
and commonly weigh from 3 to 6 pounds each at maturity." (B. A. Young.) 
