STANDLEY TREES AND SHRUBS OF MEXICO. 643 



1. Manihot pringlei S. Wats. Proc. Amer. Acad. 26: 148. 1891. 

 Tamaulipas and San Luis Potosi ; type from Las Canoas, San Luis Potosl. 

 Shrub, 2 meters high, the stems as much as 4 cm. in diameter; bark thin, 



brownish gray, nearly smootli ; wood white, soft and fibrous ; leaves 5 or 

 7-parted, 9 to 12 cm. long, the lobes usually lobate; flowers white, about 2 

 cm. long. " Matorral " (Tamaulipas). 



2. Manihot crassisepala Pax & Hoffm. in Engl. Pflanzenreich IV. 147": 28. 



1910. 

 Known only from the type locality, Colima. 

 Tree; leaves 3-lobate, glabrate; calyx 2 cm. long; seeds red. 



3. Manihot foetida (H. B. K.) Pohl, PI. Bras. 1: 55. 1827. 

 Janipha foetida H. B. K, Nov. Gen, & Sp. 2: 84. 1817. 

 Known only from the type locality, Mexicala, Guerrero. 



Large tree with gray bark; leaves 3-parted, glabrous; calyx 1.3 cm. long? 

 ovary white-tomentulose. "Ayotectli." 



4. Manihot ang'ustiloba (Torr.) ]\Iuell. Arg. in DC. Prodr. 15': 1073. 1866. 

 Janipha manihot angustiloha Torr. U. S. & Mex. Bound. Bot. 199. 1859. 

 Chihuahua and Sonora to Oaxaca ; type from Santa Cruz, Sonora. Southern 



Arizona ; Guatemala. 



Low shrub, or often herbaceous; leaves 3 to 7-parted, the lobes 3 to 15 cm. 

 long, usually lobate but sometimes entire ; calyx about 1 cm. long. 



5. Manihot carthaginensis (./acq.) Muell. Arg. in DC. Prodr. 15^: 1073. 1866. 

 Jafropha carthuginensis Jacq. Stirp. Amer. 256. pi. 162. f. 1. 1763. 

 Manihot cJilorosticta Standi. & Goldm. Contr. U. S. Nat. Herb. 13: 375, 1911 

 Baja California to Chiapas and Yucatitn. Southern Arizona, Central America 



and northern South America ; type from Cartagena, Colombia. 



Tree or shrub, sometimes 6 meters high, sparsely branclied ; leaves 8 to 12 

 cm. long, 5 or 7-lobate. " Xcache " (Yucatan, Maya) ; " yuca de monte " (Costa 

 Eica) ; "yuca," " yuquilla " (Venezuela), "cuadrado " (Sinaloa). 



This species is said to be cultivated in Brazil for the fleshy roots, from which 

 flour is obtained. The tubers are smaller than those of M. utilissima, but richer 

 in starch. The seeds have emetic and purgative properties. 



6. Manihot intermedia Weatherby, Proc. Amer. Acad. 45: 427. 1910. 

 Guerrero ; type from Iguala Canyon, altitude 915 meters. 



Shrub, 1 to 2 meters high, glabrous ; calyx bluish outside, yellowish within. 



7. Manihot microcarpa Muell. Arg. Flora 55: 42. 1872. 

 Type from Mexico, the locality not known. 



Leaves 5 or 7-parted, 6 to 8 cm. long ; calyx 11 to 12 mm. long ; capsule 7 mm. 

 long. 



8. Manihot esculenta Crantz, Inst. Herb. 1 : 167. 1766, 

 Jatropha manihot L. Sp. PI. 1001. 1753. 



Manihot utilissima Pohl, PI. Bras. 1: 32, pi. 24. 1827, 



Manihot manihot Karst. Deutsch. Fl. 588. 1880-83. 



Cultivated, especially in Yucatan, Veracruz, Oaxaca, etc., and in some places 

 escaped from cultivation. Native of Brazil, but cultivated in most tropical 

 regions. 



Shrub, usually 2 to 3 meters high ; roots tuberous, elongate and thick ; leaves 

 3 to 7-parted, 8 to 17 cm. long, usually glabrous and glaucous beneath ; capsule 

 about 1.5 cm. long, " Huacamote," " huacamotl," " huacamotli," " yuca," " yuca 

 brava " (Ramirez) ; " cuacamote" (Oaxaca) ; "yuca amarga " (Yucatan) ; "yuca 



