CATALOGUE. 247 



may always be distinguished by the broad seinicordate base of the leaves, 

 the lower half of which is protracted and almost auriculate, and by the 

 sharply cross ribbed and at the angles, notched seeds. The form collected 

 at Zufii is suberect, nearly a span high, with leaves more sharply serrate 

 than usual, and more distinctly rugose. 



Euphoebia (Anisophyllum) pediculifera, Engelm. Bot. Mex. Bound. 

 186 ; Boiss. I. c. 48. — Plant, pale dull green, covered with a short, scanty 

 pubescence ; many prostrate stems from a perennial root, a span to a foot 

 long; leaves rather large (6" long or more), oblique, oblong, obtuse, 

 entire ; small stipules triangular-subulate ; involucres in few-flowered, 

 lateral, leafy cymes ; glands with broad, dentate appendages ; capsules 

 canescent ; seeds oblong, angular, strongly marked with 4 deep transverse 

 grooves, deeply notched on the edges. — Cienega, near Tucson, Ariz., 

 Rothrock, 1874 (576). A native of our extreme Southwest, from Arizona 

 to Southern California and into adjoining Mexico ; well marked by its 

 larger, dull grayish-green leaves, and especially by the (for the section) 

 large, deeply grooved and notched seeds, which curiously simulate some 

 insect. 



Euphorbia (Anisophyllum) hypericifolia, Linn. ; Bot. Mex. Bound. 

 188; Gray, Man. 432. — Two forms were collected by Dr. Rothrock in 1874. 

 The common form (672) from Camp Crittenden, Southern Arizona, is that of 

 the States, called E. Preslii, Guss., Boiss. I. c. 22, glabrous, with rather small, 

 blackish, much cross- wrinkled seeds The other form (720), from Camp 

 Lowell, Southern Arizona, has seeds larger than the last, in size between 

 those of E. Brasiliensis, Lam., and the large-seeded E. Bahlensis, Boiss., 

 and in form similar to them ; all of these have thick, short, almost ovate- 

 cubic, black seeds, with few prominent tubercles arranged in about 2 inter- 

 rupted transverse ridges. Our plant is nearly glabrous ; leaves very pale 

 below, with long, sparse cilice on the upper edge near the base. — The 

 different species allied to E. hypericifolia require further study, as it is a 

 mooted question whether the pubescence of the plant and even that of the 

 capsules, and the size, the color, and the markings of the seed, constitute 

 here specific differences. If they do not, then we have here one of the 

 most polymorphous species, spread over all the warmer countries of the 



