ADDISONIA 9 
(Plate 5) 
BEGONIA COWELLIL 
Cowell’s Begonia 
Native of eastern Cuba 
Family BEGONIACEAE BEGONIA Family 
Begonia Cowellit Nash, sp. nov. 
A perennial plant with slender stems of a beautiful rose color 
striated with darker rose, lobed leaves, and white flowers flushed 
with rose. The stems, which measure up to sixteen inches tall 
and are sparingly branched, arise from a short, stout, fleshy, creep- 
ing rootstock. The scarious brown stipules are broadly oval or 
nearly orbicular, about an eighth of an inch long, toothed and cili- 
ate, one-nerved, the nerve extending into a bristle. The leaves, 
of which there are usually six or eight on each stem, are spreading. 
The petioles, which equal or exceed the blades in length, those of 
the basal leaves being much longer, are colored like the stem, and 
are srt pubescent, especially toward the apex, with long 
brown hairs. The blades are broader than long, an inch to an 
inch and a quarter long and an inch and a quarter to two atl a half 
inches broad, shining, somewhat fleshy, rather dark green and 
sparingly pubescent with short appressed hairs on the upper 
surface, paler and glabrous or with a few brown hairs on the nerves 
beneath; they are unequally three- to five-lobed, the divisions 
extending to or below the middle, the lobes sparingly toothed or 
lobed. ‘The flowers are in clusters of two or three, all staminate, 
or one flower in each cluster pistillate. In the staminate flowers 
the perianth is of four parts, of which the two outer are oval to 
broadly obovate, about half an inch long and three eighths of an 
inch wide, obtuse, the two inner shorter and much narrower. The 
stamens, of which there are twenty or twenty-five, are yellow, and 
are united below into a glabrous column which is shorter than the 
cluster of anthers. The mature anthers, about one twelfth of an 
inch long, and less than one half as wide and several times as long 
as the free part of the filaments, are oblong-linear, the rounded 
connective extending beyond the anther-cells. The pistillate 
and a quarter of an inch wide. The three-celled and three-angled 
ovary is unequally winged, one of the wings much longer than the 
others. The placentas are deeply gece the divisions bearing 
ovules on both surfaces. The yellow styles are about an eighth 
an inch long and finely pubescent, and bifid, the divisions spirally 
p spilisee, The body of the capsule is about a quarter of an inch 
long and broad, the largest wing being nearly a quarter of an inch 
long. ‘The seeds are brown, oblong-elliptic, obtuse. 
