16 Muhlenbergia, Volume 9 
have been added to at different times as specimens came in. 
There are four plants or parts of plants on the upper middle 
half of the sheet. One of them is not a clover at all, and the 
other three are simple stemmed Macraez. Directly below are 
three plants which look exactly the same. The accompanying 
label in the middle reads “Baths of Collina, Macrae.” These 
plants all have sessile heads sultended by broad stipules. There 
are two sets of leaves, sessile or almost sessile, which are in- 
serted with the head. The leaflets, which are decidedly acute 
and serrate, extend beyond the head several millimeters. 
Two small plants on the upper left hand corner of the sheet 
are from sandy hills, Valparaiso, Mathews 17g. These repre- 
sent the very low form with several decumbent stems and very 
small sessile heads. This collection is cited in the original de- 
scription. 
On each side of the sheet below are pedunculated headed 
specimens from California. These are very likely Douglas’ col- 
lection of 1833, and are yood albopurpureum. ‘They are labeled 
“T. Macraei H. & Arn. in B. Misc.” and underneath “T. albo- 
purpureum Hook. and Arn.” 
Another citation in the original description is Valparaiso, 
Cuming 749. These specimens are much branched with some 
short pedunculate heads, one single, but mostly in pairs. In one 
the peduncle is 15 mm. long, while in another, one of the heads 
is sessile and the other with a peduncle 5mm. long. 
Elmer, at the end of his original description of 7. dzceph- 
alum, Bot. Gaz. 41: 312. 1906, says: “This species comes near- 
est to the so-called 7) Macraez H. & A., but it is a much smal- 
ler and more prostrate clover with leaves distinctly obovate and 
emarginate.” But this is exactly the character of the true Mac- 
raet from Chili, and the type number of bicephalum seems to 
correspond very closely. If, however, the South American plant 
can be shown to be different, the the low sessile two-headed 
plants of Pacific Grove and vicinity are 7: bicephalum. 
