438 PROCEEDINGS OF THE AMERICAN ACADEMY 



Eriogonum atrorubens, Engelm. — Norogachi (JJ); known as 

 " Yerba Colorado," the large red roots much used as an astringent and 

 for the toothache. 



Eriogonum poltcladon, Benth. — Norogachi (385). 



Polygonum Persicaria, Linn. — Hacienda San Miguel (137). 



Antigonon leptopus, Hook. & Arn. — Hacienda San Jose (46). 



LoRANTHUS (EuPSiTTACANTHUs) Palmeri. Parasitic uj^on Bur- 

 sera hipinnata : stems stout : leaves opposite, broadly spatulate or 

 obovate, rounded or truncate at the summit, attenuate to a slender 

 petiole, glabrous, with irregularly branched veins, 1 to 1\ inches long: 

 peduncles axillary, 3-flowered, an inch long; pedicels half as long, 

 with a very short obliquely cupulate bract: petals 1^ inches long, 

 " magenta-colored." — Hacienda San Miguel (219). 



Euphorbia dioscoreoides, Boiss. — Same locality (134). 



Euphorbia pilulifera, Linn. — Same locality (150). 



Euphorbia heterophylla, Linn. — Same locality (122). 



Euphorbia cuphosperma, Boiss. — Same locality (95). 



Euphorbia adenoptera, Bertol. — Norogachi (381). 



Euphorbia thymifolia, Burm. ? This species is reported to have 

 been collected in Chihuahua by Potts, and in several other localities in 

 Mexico and Central Mexico. Palmer's specimens appear to differ from 

 the usual form in the more nearly sessile oblong-ovate capsule with 

 rounded nearly nerveless lobes, and the seeds more deeply grooved. — 

 Hacienda San Jose (77). 



Euphorbia scabrella, Boiss. In the more perfect involucres 

 there are five glands ; some usually remain undeveloped. — Hacienda 

 San Miguel (121, 149). 



Euphorbia (Cham^esyce) gracillima. Annual, erect, very 

 slender and diffusely branched, low, glabrous : leaves glaucous, nar- 

 rowly linear with revolute entire margins, 2 to 5 lines long, on short 

 petioles : pedicels solitary, very slender, divaricate, 1 or 2 lines long ; 

 involucre campanulate, very small (^ line long), the greenish glands 

 with very short white appendages : capsule triangular-globose, acutely 

 lobed, \ line long : seed reddish, oblong, smooth, the sides somewhat 

 concave. — Hacienda San Jose (68). Allied to E. zygaphylloides, Boiss. 



Euphorbia (Alectoroctonum) plicata. Suffrutescent, with 

 long spreading branches, glabrous, 5 to 8 feet high : leaves in threes, 

 oblong-lanceolate, obtuse or slightly emarginate or rarely acutish, 

 cuneate at base, nearly glabrous above, finely pubescent beneath, as 

 well as the slender petiole (4 to 6 lines long), 1 to 3 inches long, 

 the floral linear : inflorescence very finely appressed-pubescent, the 



