34 Munz AND JOHNSTON:’ PLANTS OF CALIFORNIA 
mountains have strikingly smaller corollas, the perianth-segments 
measuring 6-7 cm. in length. Under the original description 
Dr. Torrey quotes Bigelow to the effect that this species has 
perianth lobes 24 or 3 inches (6.25-7.5 cm.) long, while Wooton 
and Standley (Contr. U.S. Nat. Herb. 19: 135. 1915) give them as 
5-8 cm. long, and Trelease (Rep. Missouri Bot. Gard. 13: I10. 
1902) says that they are “about 75 mm.” long; these facts would 
indicate that our large-flowered plants have flowers large for the 
species. It is to be hoped that future collections will be made 
with especial attention to this species, in order to ascertain the 
exact nature and extent of the floral variation here indicated. 
In passing, it should be noted that the style-characters given by 
Trelease (Rep. Missouri Bot. Gard. 13: 46. 1902; and Contr. U.S. 
Nat. Herb. 23: 91. 1920) and the flower- and foliage-characters 
given by Sargent (Gard. & For. g: 104. 1896) seem to be il- 
lusionary,and that the distinctness between our western Y. mo- 
havensis and the Texan plant originally called Y. baccata var. 
macrocarpa (Torrey, l.c.) is open to strong doubt. We would use. 
the name Y. macrocarpa (Torr.) Coville (Contr. U. S. Nat. Herb. 
4: 202. 1893) in preference to Y. mohavensis Sarg., were it not 
for Engelmann’s Y. macrocarpa (Bot. Gaz. 6: 224. 1881); the de- 
notation of Y. macrocarpa Engelm. is uncertain from the literature 
(Trelease, op. cit.98. 1902; Sargent, /.c.; and Engelmann, Bot. 
Gaz. 7:17. 1882); and it is thought best to make no change in > 
our usage until it has been definitely decided whether Engel- 
mann’s species be a synonym of Y. Schottii or actually identical 
with Torrey’s var. macrocarpa, as Wooton and Standley have 
treated it. In other words we use Y. mohavensis in a wide sense 
and include therein Y. baccata macrocarpa Torr., though appreci- 
ating the fact that Y. mohavensis may not be the correct name for 
such a concept 
Dr. Merriam (N. Am. Fauna 7: pl. 12, I4. 1893) has given 
two plates that show the very different forms which characterize 
Y. baccata and Y. mohavensis. Although his plate of the latter 
represents the dominant and ordinary phase of that species, yet 
we observed a phase with unbranched trunks and usually longer 
leaves, whose habit is strongly suggested by the plants of a very 
different species, figured in pl. 3 of the third report of the Missouri 
Botanical Garden. 
