STANDLEY — TREES AND SHRUBS OF MEXICO. 727 



9. Rhamnus microphylla Willd. ; Roem. & Schult. Syst. Veg. 5: 295. 1819. 

 Coahuila, San Luis Potosf, and Hidalgo ; type from Real del Monte, Hidalgo. 

 Low shrub with brown puberulent branches ; leaves 7 to 15 mm. long, rounded 



at apex, serrulate, glabrate, often yellowish beneath ; flowers glabrous ; petals 

 present ; fruit 5 to 6 mm. long. 



10. Rhamnus pringlei Rose, Contr. U. S. Nat. Herb. 8: 51. 1903. 

 Oaxaca ; type from foothills of Sierra de San Felipe. 



Small shrub ; leaves short-petiolate, oblong-elliptic to suborbicular, 2 to 5.5 

 cm. long, irregularly serrulate ; umbels densely pilose ; fruit about 5 mm. long, 

 glabrous. 



11. Rhamnus macrocarpa Standi., sp. nov. 



Type collected on hills near Patzcuaro, MichoacSn (Pringle 5331; U. S. Nat. 

 Herb. no. 316795). 



Branches brown, puberulent ; leaves short-petiolate, oblong or narrowly ellip- 

 tic-oblong, 1.2 to 3 cm. long, rounded or obtuse at apex, crenate-serrulate, green 

 above, sparsely puberulent, yellowish beneath, puberulent along the nerves ; 

 pedicels puberulent ; fruit 1 cm. broad. 



12. Rliam.nus capreaefolia Schlecht. Linnaea 15: 464. 1841. 

 Veracruz and Oxaca ; type from Malpais de Naolinco, Veracruz. 



Tree, 4.5 to 6 meters high ; leaves 4 to 14 cm. long, thin, green or yellowish 

 beneath, obscurely serrulate, pubescent or glabrate beneath ; flowers pilose ; 

 petals present ; fruit 5 to 7 mm. in diameter, often pilose. 



13. Rhamnus mucronata Schlecht. Linnaea 15: 465. 1841. 

 Rhamnus nelsoni Rose, Contr. U. S. Nat. Herb. 8: 50. 1903. 

 Rhamnus oMiqua Rose, Contr. U. S. Nat. Herb. 8: 51. 1903. 



Tepic to Zacatecas, Mexico, and Chiapas ; type collected near Chantla and 

 Angangueo, Michoac^n. 



Shrub or small tree, 1.5 to 4.5 meters high ; leaves 4 to 11 cm. long, thin, 

 bright green, often yellowish beneath, serrulate or subentire, pubescent or 

 glabrate ; flowers puberulent or short-pilose ; petals present ; fruit 5 to 7 mm. 

 long, glabrous. 



DOUBTFUL SPECIES. 



Rhamnus terniflora DC. Prodr. 2: 26. 1825. Based upon one of Sesse and 

 Mocino's plates. 



92. VITACEAE. Grape Family. 



Reference : Planchon, Monographie des Ampelidees vraies, in DC. Monogr. 

 Phan. 5: 305-654. 1887, 



Scandent shrubs or sometimes herbs, usually with tendrils ; leaves alternate, 

 simple or compound, petiolate ; flowers small, perfect or polygamous, usually 

 in cymes ; calyx entire or 4 or 5-dentate ; petals 4 or 5, valvate ; stamens 4 or 5, 

 opposite the petals ; fruit a 1 to 4-celled berry. 



Leaves digitately 5 to 7-foIiolate 1. PARTHENOCISSUS. 



Leaves simple, trifoliolate, or temately compound. 



Petals coherent into a cap, caducous. Leaves simple 2. VITIS. 



Petals distinct, spreading. 



Petals 4; disk 4-lobate 3. CISSUS. 



Petals usually 5 ; disk 5-lobate or lO-striate. 



Disk annular, 10-striate 4. AMPELOCISSUS. 



Disk cupular, 5-lobate 5. AMPELOPSIS. 



