December 7, 1907 125 
form of Echinocystis macrocarpa* which grows here in typical 
form, as also others with the leaf characters assigned to AZ. dep- 
tocarpa more or less developed, so that the two clearly run to- 
gether. No distinctions could be found in the flower, or in the 
fruit, which is six seeded. 
Another of ‘Mr. Wright’s discoveries in this canyon was 
Mirabilis tenuiloba, an excellent species, well characterized by 
the long, narrow lobes of the involucel. The whole plant is 
clammy-viscid; the flowers are white, and more campanulate 
than those of IZ. Californica. It grows mostly in large compact 
clumps, but sometimes it is straggling, and supports itself on 
shrubs. On the western side of the canyon, where most exposed 
to the sun, the plants were loaded with ripe seed, but on the 
shaded eastern bank they were yet in full flower. Both this spe- 
cies and JZ. asfera are more tolerant of exposure to the sun than 
is M. californica. M. aspera is very common in both the Mo- 
jave and the Colorado deserts, and where it grows far out in 
those arid regions it is very distinct, having much the habit of 
M. tenutloba, although more commonly straggling in its growth, 
the foliage rough, only the inflorescing tips of the stems viscid- 
ulous, and the flowers small and white. On the confines inter- 
mediate forms appear, with less roughened foliage and larger 
purplish flowers, which connect it too closely with MZ. califor- 
nica, of which it may be regarded as a subspecies.} _ 
This canyon is also the type locality for several species 
characterized from specimens collected by the present writer. 
Of these Delphinium Parishit, a plant with loosely flowered 
spikes of light blue flowers, is quite common on the hills in this 
part of the desert. On the margin of the stream was collected 
the type specimen of Eleocharis Parishiz, and there also grew 
the tussock of robust sedge that furnished the material on 
* Echinocystis macrocarpa forma leptocarpa. Mic vamp: lis le plac ay apa Greene, 
Pittonia 2: 282. 1892. 
+ Mirabilis californica Gray, subsp. aspera n. comb. JL aspera Greene’ 
Erythea 4: 67. i895. 
