Munz AND JOHNSTON: PLANTS OF CALIFORNIA 33 
Brandegee (Zoe 5: 153. 1903). Mulford has cited a collection 
made by Parish at Ivanpah (Rep. Missouri Bot. Gard. 7: 78. 
1896). 
Yucca BACCATA Torr. 
Yucca baccata Torr. Bot. Mex. Bound. Surv. 221. 1859. 
The presence of this species in the Providence Mountains was 
reported recently by Mr. Parish (Bot. Gaz. 65: 336. 1918) and at 
’ a much earlier date by Dr. Engelmann (Trans. St. Louis Acad. 3: 
44. 1873), so that all that remains for us to do is to add a few 
notes on its habits. This species and Y. mohavensis are very 
common in the vicinity of the Bonanza King Mine but, although 
growing in the same region, differ widely in habitats and 
habits, as well as in technical characters. Y. baccata grows on 
rocky, sunny hillsides in the pinyon belt and is a very late-flowering 
plant; for but few individuals were in flower during our visit to 
the mountains from May 21 to 24, 1920. On the other hand, 
Y. mohavensis grows along the foot of the mountains, below the 
pinyon belt, and flowers very early; for on the May visit fruit 
was set, flowering having been observed on an earlier visit during 
the last week in March. Our observations fully substantiated 
Mr. Parish’s statement that Y. baccata was recognizable in the 
field by the lighter color of the leaves and the universal acaulescent 
abit. 
Structurally the two species are very distinct. Y. baccata has 
large campanulate flowers, whose perianth segments do not spread 
from the base but remain erect and appressed about the ovary 
for a short distance before spreading, thus suggesting the tubular 
condition characteristic of the genus Samuela Trel. In 
mohavensis the shorter segments spread from the very base and 
are more curved, thus making the flowers globose in shape. 
The meager material that is available of Y. baccata suggests 
that there may be a major and a minor flower form. Mr. Brande- 
gee’s collection, reported as Y. mohavensis (Zoe 5: 153. 1903), 
Lemmon’s 1884 collection at Ft. Mohave, and our M, J & H 4174 
all represent plants with conspicuously large flowers, the perianth- 
segments of which vary between 8 and 9.5 cm. in length. On the 
other hand, Parish 10281 from the north end of the Providence 
Mountains and our M, J & H 4113 from the south end of these 
