STANDLEY TEEES AND SHRUBS OF MEXICO. 1183 



Corolla lobes broadly ovate, obtuse or acutish, the margins not revolute. 



1. D. stapeliaeflorus. 

 Corolla lobes deltoid to linear-lanceolate, acuminate, the margins revolute. 

 Throat of the corolla vertically striped, not reticulate or reticulate only 

 at base. 



Corolla about 13 mm. long 2. D. tuberosus. 



Corolla 2.5 to 4 cm. long 3. D. pavonii. 



Throat of corolla reticulate or with horizontal stripes. 



Corolla less than 1.5 cm. long 4, D. parviflorus. 



Corolla 2 to 5 cm. long. 



Corolla throat horizontally striped . 5. D. tigrinus. 



Corolla throat densely reticulate 6. D. ceratopetalus. 



1. Dictyanthus stapeliaeflorus Reichenb. Sel. Sem. Hort. Dresd. 4. 1850. 

 Type from the Sierra Madre of Durango ; specimens from Guerrero probably 



belong here. 



Stems scandent, sparsely hirsute ; leaves ovate-cordate or deltoid-cordate, 

 acute or acuminate ; peduncles 1 or few -flowered ; corolla 3.5 to 5 cm. broad, 

 yellowish green, veined with purple, the veins of the lobes reticulate, those in 

 the upper part of the throat concentric and distinct. 



2. Dictyanthus tuberosus Robinson, Proc. Araer. Acad. 27: ISO. 1892. 

 Jalisco ; type from Guadalajara. 



Stems suberect, suffrutescent, hirsute ; leaves broadly cordate-ovate, 2 to 4 

 cm. long, acute or acuminate, pubescent ; umbels 1 to 4-flowered, sessile or short- 

 pedunculate ; corolla campanulate, brown-purple ; follicles about 5 cm. long, 

 armed with short stout spines. 



3. Dictyanthus pavonii Decaisne in DC. Prodr. 8: 605. 1844. 

 Tympananthe suberosa Hassk. Flora 30: 758. 1847. 

 Dictyanthus campanulatus Reichenb. Sel. Sem. Hort. Dresd. 4. 1850. 

 Rytidoloma retioulatum Turcz. Bull. Soc. Nat. Moscou 25^: 320. 1852. 

 Dictyanthus reticulatus Benth. & Hook.; Hemsl. Biol. Centr. Amer. Bot. 2: 



329. 1882. 



Sinaloa to Jalisco and Morelos. 



Stems scandent, hirsutulous or glabrate; leaves long-petiolate, ovate-cordate, 

 often broadly so, 5 to 12 cm. long, obtuse to acuminate, minutely pilose ; cymes 

 racemiform, 1 to few-flowered ; corolla 4 to 7 cm. wide, broadly campanulate, 

 the lobes reticulate-veined with brown-purple. 



4. Dictyanthus parviflorus Hemsl. Biol. Centr. Amer. Bot. 2: 329. 1882. 



Dictyanthus pro.stratus T. S. Brandeg. Univ. Calif. Publ. Bot. 7: 329. 1920. 



Morelos and Veracruz ; type probably from Cuernavaca. El Salvador. 



Stems suberect or scandent, suffrutescent below, hirsute; leaves ovate- 

 cordate, often broadly so, 1 to 3.5 cm. long, acute, deeply cordate at base, 

 pubescent ; flowers mostly solitary, short-pedicellate ; corolla 1 to 2 cm. 

 broad, brown-purple; follicles glabrate, tuberculate. " Yulpate " (El Salvador). 



5. Dictyanthus tigrinus Conzatti & Standi., sp. nov. 



Oaxaca and Veracruz ; type from Laguna de Ojitl^n, Distrito de Tuxtepec, 

 Oaxaca, altitude 350 meters {Conzatti 3760; U. S. Nat. Herb. 1014030). 



Stems scandent, sparsely hirsutulous with recurved hairs; leaves long- 

 petiolate, ovate-cordate, 9 to 10 cm. long, 6 to 7 cm. wide, long-acuminate, 

 deeply cordate at base, minutely puberulent ; peduncles 1 to 1.5 cm. long, 

 1 to 4-flowered ; calyx lobes lanceolate or lance-oblong, 13 mm. long, long- 

 acuminate; corolla about 7 cm. broad, minutely puberulent, the lobes lance- 



