STANDLEY — TREES AND SHRUBS OF MEXICO. 677 



1. WIMMERIA Scblecht. & Cham. Linnaea 6: 427. 1831. 



Shrubs or trees ; leaves alternate, serrate or creuate, estipulate ; flowers 

 small, in axillary cymes; calyx 5-lobed ; petals 5; stamens 5; ovary 3-celled, 

 with 6 to 8 ovules in each cell ; fruit samaroid, 1-celIed, 1 or 2-seeded, with 3 

 broad longitudinal wings. 



Fruit evidently longer than broad, usually 2 to 3 cm. long 1. W. concolor. 



Fruit as broad as long or broader, rarely as much as 1.5 cm. long. 

 Petioles and leaf blades glabrous. 



Leaves obtuse 2. W, pallida. 



Leaves acuminate or long-acumniate. 



Leaves ovate ;• fruit shallowly notched at apex _3. W. persicifolia. 



Leaves lanceolate ; fruit deeply notched at apex 4. W. lanceolata. 



Petioles, and usually the lower surface of leaves, pubescent. 



Leaf blades glabrous 5. W. confusa. 



Leaf blades pubescent on one or both surfaces. 



Fruit as long as broad ; leaves sparsely pubcrulent beneath, glabrate 



above 6. W. pubescens. 



Fruit broader than long ; leaves densely puberulent on both surfaces. 



7. W. microphylla. 



1. Wimmeria concolor Schlecht. & Cham. Linnaea 6: 428. 1831. 

 Wimmeria discolor Schlecht. & Cham. Linnaea 6: 428. 1831. 

 Tamaulipas, San Luis Potosi, and Veracruz ; type from Colipa, Veracruz. 

 Shrub or tree, 1 to 12 meters high, the trunk sometimes 30 cm. in diameter; 



leaves ovate or lance-ovate, 4 to 6 cm. long, acute or acuminate, crenate-serrate 

 or nearly entire, lustrous on the upper surface; petals 3 mm. long; fruit 1.5 

 to 2.5 cm. wide, often tinged with red. " Pimientilla " (Tamaulipas); " palo 

 cadillo " (San Luis Potosi). 



Palmer states that the wood is light-colored, and that it is used for rail- 

 road ties. 



2. Wimineria pallida Radlk. Sitzungsb. Math. Phys. Akad. Wiss. Miinchen 8: 



379. 1878. 

 Guerrero ; type probably from Acapulco. 



Spreading glabrous shrub, 2.5 meters high ; leaves ovate or lance-ovate, 5 to 

 8.0 cm. long, slender-petiolate, crenulate ; fruit 1.5 to 2 cm. broad. 



3. Wimmeria persicifolia Radlk. Sitzungsb. Math. Phys. Akad. Wiss. Miin- 



chen 8: 379. 1878. 



Guerrero, Morelos, and Oaxaca ; type from Ejutla, Oaxaca. 



Glabrous shrub or tree, 3 to 6 meters high ; leaves slender-petiolate, 4 to 8.5 

 cm. long, finely crenate-serrate, long-acuminate ; petals 4 to 5 mm. long ; fruit 

 1.5 to 2 cm. wide. " Chapulizle " (Oaxaca, Reko). 



4. "Wimmeria lanceolata Rose, Contr. U. S. Nat. Herb. 12: 283. 1909. 

 Guerrero ; type from Iguala. 



Shrub, 3 to 5 meters high, glabrous throughout ; leaves slender-petiolate, 

 5 to 11 cm. long, crenate-serrulate ; petals cream-colored, 3 to 4 mm. long; 

 fruit 1 to 2 cm. broad. 



5. Wim^meria confusa Hemsl. Diag. PI. Mex. 6. 1878. 



Chihuahua, Sonora, Durango, Sinaloa, Jalisco, and Aguascalientes (type 

 locality). 



Shrub or tree, 2 to 8 meters high ; leaves short-petiolate, lanceolate, oblance- 

 olate, or obovate, 1 to 4 cm. long, obtuse or rounded at apex, crenulate or 



