186 BOTANICAL GAZETTE [SEPTEMBER 
plant shown in fig. 11 grew in the latter situation. The upper 12 in. 
of soil was sandy adobe, followed by 10 in. of clayey adobe with 
some gravel. Below this was a layer of loose gravel about 2 in. in 
ickness, under which was fine sand to an unknown depth. The 
plant was 18 in. in height. The root system was of the specialized 
type with strongly developed tap root. There were a few well 
developed laterals, two of which arose 
at the junction of the layers of sandy 
and clayey adobe. Upon reaching the 
layer of loose gravel, one of these 
turned abruptly and proceeded hori- 
zontally in the gravel layer, possibly 
tortuous course downward and was lost 
at a depth of 65 in., below the level 
3 mm., its total length was undoubtedly 
- much greater. Numerous small laterals 
arose in the upper 12 i in of soll. 
Cucurbita foetidissima.—This per- 
- ennial herbaceous vine is common along 
irrigation ditches in the valley and less 
so along the sides of arroyo beds. The 
a i--Comiptone Fendleri_ root is extremely thick and fleshy and 
is surmounted by an underground stem 
6 in, in length. The ais Wook of the ea since was wan 
ee 365) in. in diameter at the top and extended to a depth of 20 in., 
oe eg becoming horizontal and forking several times after 
. ing a length foe in. The main root bore only one small 
: ates (ig. 12). 
Pa s 
bus ~ ulus. This pai ten Babi ad is » 
; d slopes of the gravelly 
