STANDLEY TREES AND SHRUBS OF MEXICO 1419 



5. ALOMIA H. B. K. Nov. Gen. & Sp. 4: 151. pi. 354. 1820. 



Reference: Robinson, Revision of the genus Alomia, Proc. Amer. Acad. 49: 

 438-454. 1913. 



1. Alomia isocarphoides (DC.) Robinson, Proc. Amer. Acad. 49: 449. 1913. 



Coelestina isocarphoides DC. Prodr. 5: 107. 1836. 



Coelestina isocarphoides dentata DC. Prodr. 5: 107. 1836. 



Ageratum isocarphoides Hemsl. Biol. Centr. Amer. Bot. 2: 82. 1881. 



Carelia isocarphoides Kuntze, Rev. Gen. PI. 1: 325. 1891. 



Type from Mexico, without definite locality; doubtfully recorded from 

 Veracruz. 



Suffruticose, hispid-pubescent; leaves opposite, the blades lanceolate, acumi- 

 nate, subsessile, 3-nerved, scabrous above, velvety-villous beneath; heads about 

 25-fiowered, corymbose; pappus none. (Description compiled.) 



A doubtful species. 



6. JALISCOA S. Wats. Proc. Amer. Acad. 25: 153. 1890. 

 Suffrutescent; leaves opposite or ternate, ovate, thin, slender-petioled, tripli- 

 nerved; heads small, in dense corymbiform panicles terminating stem and 

 branches; involucre 2-seriate, equal, dryish; receptacle paleaceous; flowers white; 

 achene 4-angled, slender; pappus a mere border or a lacerate-fimbriate crown. 



Only the two species here listed are known. 

 Pappus an obscure entire callous border; leaves sharply serrate. _1. J. pringlei. 

 Pappus a lacerate-fimbriate crown ; leaves obtusely serrate or crenate-serrate. 



2. J. pappifera. 



1. Jaliscoa pringlei S. Wats. Proc. Amer. Acad. 25: 153. 1890. 



Known only from the type locality, Rio Grande de Santiago, barranca of 

 Guadalajara, Jalisco. 



Erect, branched, obscurely puberulous, 1.6 to 2.6 meters high; leaf blades ovate, 

 6 to 12 cm. long, acuminate, sharply and closely serrate, loosely glandular- 

 puberulous beneath, more densely so along the veins. 



2. Jaliscoa pappifera Blake, Contr. U. S. Nat. Herb. 22: 587. 1924. 

 Known only from the type locality, near Cuernavaca, Morelos. 



Similar; leaves obtusely serrate or crenate-serrate, sparsely puberulous beneath 

 with mostly appressed hairs; pappus a lacerate-fimbriate crown about 0.3 mm. 

 high. 



The stems of this and the preceding species are always more or less densely 

 riddled by elliptic holes, evidently made by weevils, which sometimes extend quite 

 through the stem. 



7. OAXACANIA Robins. & Greenm. Amer. Journ. Sci. III. 50: 151. 1895. 

 1. Oaxacania malvaefolia Robins. & Greenm. Amer. Journ. Sci. III. 50: 151. 

 1895. 



Oaxaca and Puebla; type from Tomellin Canyon, Oaxaca. 



Suffrutescent, much branched, very leafy, densely glandular-pubescent, about 

 1 meter long; leaves alternate, the blades roundish, 1.5 to 3 cm. wide, shorter 

 than the petioles, about 5-lobed, the lobes again lobulate; heads 1 to 1.2 cm. 

 high, panicled, pedunculate; involucre about 5-seriate, graduated, the phyllaries 

 dryish, vittate; receptacle paleaceous; flowers white; achenes linear, strongly 

 compressed, blackish, hispidulous with subglandular hairs; pappus a short 

 lacerate crown. 



8. ASCHENBORNIA Schauer, Linnaea 19: 716. 1847. 

 1. Aschenbornia heteropoda Schauer, Linnaea 19: 716. 1847. 

 Known only from the type locality, Tacubaya, State of Mexico. 



