84 Contributions to Western Botanp. 
by the serratures when present, the variable sepals and crested 
ovary. The sepals are not constricted over the ovary 
in A. platycaule. The so-called species A. falcifolium 
Breweri, platycaule, Douglasii, Tolmiei, Cusickii, pleianthum 
and Hendersoni all grow on the same kiad of soil and in sim- 
ilar situations, a very barren clay or decomposed porphyry, on 
bare slopes or knoils which are well drained. ‘They prefer shal- 
Jow soil on flat rocks. ‘The first two grow in the Tropical Zone 
as to climate; the third in the upper Temperate near the alpine, 
and the others in the lower Oak or middle Temperate. 
A. parvum is put with this group because of the bulb char- 
acter but the writer did not intend to say thatit is not a well 
marked species. 
A. parvum var. Brucae is common in the Sierras and has 
been collected and distributed by Congdon as A. obtusum Lem- 
mon. 
A. sérratum var. dichlamydeum (Greene), A. dichlamydeum 
Greene Pitt. 1 166. This is a well marked variety with very 
broad and abruptly acute sepals. Have seen dupiicate types. 
A. unifolium Kell. is very close to A. peninsulare Lemmon. 
Its peculiar character of root is imaginary. ‘The root is no more 
a coated corm than many other onions. There are few scales 
anda solid center asin A peniasulare, falcifolium, ete. ‘The stem 
is peculiar in coming from a horizontal ovate bulb, and coutin- 
ues horizontal for about two inches and then turns upright. 
At the bend it roots and forms a néw bulb. This character 
favors its spreading underground. 
A. Bolanderi as to its root is liable to be taken for a corm also 
as it propagates by the production of a new bulb from the lower 
corner of the old one, and as both bulbs are alive it makes the 
root seem oblong and something like a rootstock or short corm. 
The markings place it near to the peninsulare group, but they 
are variable. 
A. lacunosum Watson was correctly placed by Watson in 

