1917] 
GATES—THE GENUS TRILLIUM 61 
April 14, 1908, C. F. Baker 3010 (Univ. Cal. Herb., 142145), 
same as Sherwood Valley specimen. 
The line between T. ovatum and var. stenosepalum is not 
very sharply defined. The differences are discussed under 
var. stenosepalum. 
25a. Var. trans. stenosepalum Gates, n. var. Plate 6, fig. 2. 
Herba glabra, foliis parvis, ovatis, 5-nerviis, breviter acum- 
inatis, ad basim rotundo in petiolo perbreve constricto; 
редипешо erecto; sepalis brevibus, lanceolatis, acuminatis, 
13-33 mm. longis, 3.5-6 mm. latis; petalis albis, oblongo- 
obovatis, obtusis, marginibus undulatis, sepalis multum ex- 
cedentibus; antheribus 8 mm. longis, flavis stigmatibus 
multum а. stigmatibus perbrevibus, tenuis, apici- 
bus recurvatis. 
Rootstock horizontal; stem rather slender, 19-30 em. in 
length, 3-9 mm. in thickness, purplish above the base, which 
is sheathed for 3-5 em.; leaves ovate, 5-nerved, 5.5-10 cm. 
long, 4.5-7.5 em. broad, acute, short-acuminate, rounded at the 
base and sharply constricted into a very short petiole; 
peduncle about 2-6.5 em. in length, erect, 1 mm. thick; sepals 
lanceolate, acuminate, about 13-33 mm. long, 3.5-6 mm. wide, 
delicate; petals white, oblong-obovate, obtuse, margin some- 
what waved, 20-43 mm. long, 10-15 mm. broad; anthers yel- 
low, straight, 8 mm. long, much exceeding the stigmas, fila- 
ments 5 mm. long, very slender; stigmas very short (2-3 
mm.), slender, nearly erect, tips recurved, ovary yellow, and 
about 5 mm. in length. The three veins in the sepals are very 
inconspicuous and in small specimens are only visible with a 
lens. 
This strikingly distinct variety stands between Т. Scouleri 
and Т. grandiflorum in certain respects but shows a number 
of peculiarities. The leaves resemble those of T. Scouler? but 
are not as small as the minimum size in that species, and 
scarcely rhomboid. The flowers resemble those of Т. grandi- 
Логит but are smaller in all their parts. The sepals in par- 
ticular are greatly reduced in comparison with the petals. 
The variety stenosepalum is separated from Т. venosum not 
