88 Cockerell: Notes ox some Southwestern Plants 



and at the same place plenty of M. coccineum, which is a very 

 distinct plant. In Wet Mountain Valley, Colorado, M. diss ec turn 

 was common, and passed for M. coccineum, which was not found 

 there. In addition to the taller growth and very different leaves 

 of M. coccineum, there is a difference in the lobes of the calyx, 

 which in dissectum have short linear reddish tips, wanting in 

 coccineum. 



M. dissection in the young state of the fruit has two ovules in 

 each carpel, but one aborts, or not rarely both. Thus the distinc- 



■ 



tion between Malvastrum and Spliaeralcea must rest not so much 

 on the number of ovules as on their condition Avhen mature : in 

 the former genus closely adherent to the carpel wall, in the latter 

 free and pubescent. It is unfortunate that the use of the name 

 dissectum in a specific sense will interfere with the South African 

 M. dissectum Harv • in Harv. Rr SonH.. FL Can t • t6/i 



Sphaeralcea lobata perpallida n. var. 



Flowers very pale pinkish instead of scarlet. This occurs as 

 a sport in the Mesilla Valley, N. M., but from Rincom, N. M., 

 twenty miles or more northward along the railroad, it occurs 

 abundantly to the exclusion of the type. £. lobata (typical form) 

 occurs as high up as Las Vegas, N. M., in abundance. 5. cuspidata 

 (Gray) is common at the same place, and very distinct from lobata. 

 The pollen of cuspidata is pale lemon-yellow, that of lobata bright 

 orange. 



Prosopis velutina Wooton 



I found this common throughout the Salt River Valley, 

 Arizona, and at Buckeye. At the last mentioned place it grows 

 to a tree of very fair size. 



Rosa Arkansana suffulta=/?. suffulta Greene, Pittonia, 4 : 12 



I found this abundant at Las Vegas, between the town and the 

 Hot Springs. The stipular leaflets are as described by Greene. 



Verbena Macdougalii Heller 



This is extremely common at Las Vegas, N. M., and I had no- 

 ticed that it did not agree with the description of V. stricta. The 



the vicinity : 



Veg 



