22 Contributions from the Gray Herbarium 
fore is no more than a variety of M. tenuiloba and typifies the 
same sort of variation that is found in M. californica. 
There remains to be noted the variants of M. californica. On 
the whole I agree with Jepson’s treatment of these forms except 
that (as indicated by Standley, 1. c. 236) the var. glutinosa and the 
var. retrorsa represent one and the same plant. In spite of the 
fact that Jepson writes that Hesperonia cedrosensis Standley 
““ seems no more than a form of M. californica ’’ he makes the com- 
bination M. cedrosensis (Standley) Jepson, 1. c. 459. It is indeed 
only a variant of Gray’s plant as is shown by some specimens 
from San Diego county which are evidently transitional since they 
exhibit in no small part the same peculiar scabrous pubescence of 
short conic hairs that characterizes Standley’s species. 
The plants here discussed may be summarized as follows: 
a. sige evidently more or less pubescent at least above. 
uit never truly globose, longer than broa 
¢. Tnvoluere (10—) 13-15 mm. long, in fruit the lanceolate 
var an apical wie lobes distinctly longer than 
uiloba. 
Steins pubeovent to the eres Sypical «011. sie 
c. Involucre not over 10 mm. long, the usually ovate lobes 
often shorter ten the tube. 
- ~ 0 volucre 
d. Fruit ees cylindrical, 7-8 mm. long; in © MM. oligantha. 
d. Fruit Fae is ‘spares but evidently er than thick, 
idan . long; involucre 5—7(—8) mm mm. long. 
é. knees e villous or at least the hairs mostly 
eciien: not predominantly short-conic. 
f. Plant somewhat villous, at least above; pedun- 
. cles, at least all the upper, much shorter 
si igs involucres; perianth usually red- 
C16 e ele eo ele bee ee eee ee eS me ee Oe, Oe oe 
deena Wabieate below; fi lower leaves acutish or 
cee roel eee ee ee 
Stems villous nearly or quite to the base; ; 
leaves broadly rounded at apex. ..-.-.-- 3a. var. aspera 
peduncles even the upper often as long, or 
ong, as the involucres; perianth 
Se Rete eS ere a 
ee eee eee ae 
b. Fruit truly globose; known only from Guadalupe Island . 4. M. Heimer 
a. Plant — or the inflorescence minutely and sparsely 5 
; known only from Magdalena Bay.....------- 5. M. laens 
