26 BOTANY 
Puorapenpron Cauirornicum, Nutt., 1. c. VWallecito. Parasitic on* Larrea Mexicana; No- 
vember 18, (immature fruit.) ‘‘Banks of New river and on the Colorados; Camp 40; February. 
On Algarobia glandulosa (mesquit.) Berries pinkish white. It often destroys the trees upon 
which it grows.’’ 
PHORADENDRON JUNIPERINUM, Engelm. in Gray, Pl. Fendl., p. 59. ‘‘ Parasite on Juniperus 
tetragona. Camp 63; March 27.” 
SANTALACEZ. 
COMANDRA UMBELLATA, Nutt. Gen. 1, p. 157, var. anaustiroLiA, Torr. Bot. Mex. Bound., 
p. 185. ‘‘Partridge creek, April 24, and Camp 63, March 28.” 
EUPHORBIACEA. By Dr. George Engelmann. 
Apuora sprRATA, Zorr. Bot. Mex. Bound. Surv., p. 197. Gravelly places on the Upper 
Colorado; January 25 to April 1. Flowers greenish white. 
Croton (HENDECANDRA) PROCUMBENS, Eschsch.; Torr. l. c., p. 195. On the bottom lands of 
the San Diego river, California; November 9. Grows in tufts two and three feet high. 
EvpHorsia inmQuinaTERA, Sonder Linnea; Engelm. in Mex. B. Rep., vol. II, ined. Mojave 
valley. This is the same as Plant Fendl., No. 803; an almost prostrate form, with small narrow 
leaves, which are only towards the Saud very slightly denticulate; seeds scarcely undulate or 
nibbed. This species has a very wide extension; it is found in Florida and the West India 
islands, in the west from Nebraska to Texas and to California and Oregon, (in India, E. Nilagirica; 
in South Africa, E. ineequilatera and E. setigera,) and in New Holland. fa 
EvPHORBIgt MELANADENIA, Torr. in Bot. Whipple P. R. Rep. IV, p. 135; HE. cinerascens, BS 
Engelm. in Mex. B. Rep. II, ined. In sandy arroyos, Camp 15, forming mate January 15, in 
flower, but without fruit. Many prostrate stems, a foot and more in height, from a ligneous 
root. The specimens before me are distinguished from those obtained by Dr. Bigelow by 
having unequal glands to the involucrum, those behind being much longer than those in front; 
and especially by their petaloid rose-colored appendages. The seeds are not opaque, as Prof. jorrg 
says, but reddish gray. 
EvupnHorsia POLYCARPA, Benth. Bot. Sulph., p. 49; Engelm. in Mex. B. Rep. II, ined. This is 
one of the most variable species of North America, if I understand it correctly. A form with 
narrow hispid pubescent leaves and very small appendages was collected with the last, and in 
the Purple hills, forming dense mats on the sand of dry arroyos. Another, and the most showy 
form—the same that was found by Mr. Schott and Dr. Parry at San Diego, and of which a 
specimen from the same locality is in Dr. Hooker’s herbarium, labelled by Nuttall LZ. ocellata— 
was collected at Laguna, and was seen from Los Angelos to the Colorado. This showy form 
has almost smooth #niform leaves, and very large white appendages to the dark glands. 
Evpnorsia sETILoBA, Engelm. in P. R. Rep., vol. 5, p. 364. Gravelly beds of arroyos at 
Purple hills. Also in flower in January, and probably the whole year round. Nearly allied to 
‘the last, with the same rough pubescence, but readily distinguished, not only by the deep 
laciniate appendages, but also by the almost naked inside of the involucres. I find them in Dr. | 
_ Newberry’s specimens generally triandrous, as Prof. Torrey has already noticed in the original 
: —— sent from Fort Yuma by Major Thomas. 
Bes PHORBIA (TITHYMALUS?) LURIDA, nov. spec.: e basi perennante multicaulis glaberrima junior 
- tote rubro dorida foliis Seats acutis past ees Sselonseie cmc pa POG i re 
cri parvi intus pubenscentis glandulis transversis crenatis ‘ovis ovatis jeorsBranacers 
ee stylis ovario levi multo brevioribus vix basi connatis bilobis. Camps 81-82, 
isco mountain; commencing to bloom at the end of April. I introduce this plant as 
es with a _ deal of —— as the specimens are scarcely enough advanced; 
