FOr 
[488] TRANS. OF THE ACAD. OF SCIENCE. 38 
It is always found in dry places on low herbs, especially 
Portulacea, also Kallstremia, Amarantus, Atriplex, Poly- 
gonum, etc., and sometimes even on some prostrate Huphor- 
bie: between Queretaro and Salamanca, Humboldt! Saltil- 
lo and Camargo, Gregg e , New Mexico and 
na, Wright! 1627, 1636, 1639 (371, 510, 695), Bigelow ! 
Schott! Santa Fé, Fendler! 659; foot of the Rocky Moun- 
i i urdie ! 
Md 
ne from Sonora, Coulter! 1010, 
on some “uphorbia, has the unusually small flowers (1 line 
= quite papillose-scabrous. 
ar. 8, ESERTORUM; C. Desertorum, Martius! in Hb.; 
pedicels long, flowers less crowded, smaller, 1 line long; lan- 
ceolate-linear laciniz twice as long as tube ; scales small, bifid 
y 
er! 2425, in the province of Ceara in the same neigh- 
borhood, also on Porbilisoon: im 
ripe) capsules do not open; flowers larger and more densely 
clustered than in the common form, calyx and capsule glan- 
arge. 
* M GRACILLIMA, 1. Sp.: caulibus tenuissime capillaceis 
demum deciduis; floribus in fasciculos dec mpositos demum 
