332 PROCEEDINGS OF THE AMERICAN ACADEMY. 



canons near Guadalajara, Jalisco, Mexico, 29 October, 1889, no. 2343, 

 and earlier on the Rio Blanco in the same neighborhood by Dr. Edw. 

 Palmer, October, 1886, no. 665. Both plants were distributed as E. 

 Benihamii. However, Klatt's species of that name (which is a clear 

 syuouym of the earlier E. Ehreiibergii, Hemsl.) has ovate serrate not 

 cordate leaves, more numerously flowered heads, etc. 



E. CHAPALENSE, Wats., var. salicifolium. Leaves narrowly lance- 

 olate, merely serrulate, acute at both ends, 4 to 6 cm. long, 1.2 to 1.4 

 cm. broad : scales of the involucre oblanceolate, broader than in the 

 typical form. — Collected by C. G. Pringle on mountains near Lake 

 Chapala, Jalisco, Mexico, 18 October, 1895, no. 7071. The leaves of 

 the typical form are more than 4 cm. broad. The variety retains the 

 floral characters and unequal pappus of the type. 



E. chiapense. Stem terete, clothed with a dense purplish brown 

 tomentum ; intex'nodes long (6 to 8 cm.) : leaves opposite, ovate, 

 acuminate, serrate-dentate except near the I'ounded base, dull green 

 and except on the subpinnate nerves nearly glabrate above, paler and 

 ferrugiueous-tomentose upon the nerves and veins beneath, 1 to 1.4 dm. 

 long, 6.5 to 8 cm. broad ; petioles densely tomentose, 4 to 5.5 cm. long: 

 heads numerous, 9 mm. high, about 24-flowered, borne in a compound 

 round-topped corymb (1.5 dm. broad) ; the opposite branches and 

 pedicels tomentose with purple gland-tipped hairs ; involucre subsimple 

 and scarcely imbricated ; scales about 10, narrowly linear, attenuate, 

 mostly 2-ribbed, 6 mm. long, pubescent : corollas glabrous, 5 mm. long, 

 exceeding the dull white pappus ; throat equalling the proper tube :• 

 achenes black, glabrous, tapering toward the base, 4 mm. long. — 

 Collected by E. W. Nelson, near Pinabete, Chiapas, Mexico, altitude 

 2,000 to 2,400 m., 8 February, 1896, no. 3786. This species is related 

 to E. Ehrenhei-gli, Hemsl., but has much narrower involucral scales, 

 smaller heads, glabrous corollas, etc. It is also and perhaps still more 

 closely related to E. Donnell-Smitlt'ii, Coulter, which, however, has 

 pale obtusish involucral bracts, and flowers much smaller, scarcely 

 more than half as long. 



B. crassirameum. Large shrub or small tree, 3 to 5 m. high, 

 glabrous throughout : branches thick, terete, soft-woody to the inflores- 

 cence, covered with a pale gray cortex : leaves opposite, petiolate, large, 

 deltoid-ovate, thin, pellucid-punctate, glabrous, acuminate, repandly few- 

 toothed at the sides, pinnately veined, becoming 1.5 dm. long and 

 about equally broad ; petioles 5 cm. in length : heads numerous, about 

 15-flowered, pedicellate in dense rounded compound corymbs (9 cm. in 



