314 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Flowers usually white or greenish white, 5 to 7 mm. long ; pedicels 



1 to 2 mm. long 16. R. indecorum. 



Anthers with a conspicuous cup-shaped apical gland. 



Ovary with at least a few gland-tipped hairs, or the calyx more than 1 cm. 

 long. 

 Leaves with sessile glands on both surfaces but without gland-tipped 



hairs; calyx and petals deep red 2. R. ceriferum. 



Leaves with gland-tipped hairs on both surfaces ; flowers white or green- 

 ish white, sometimes partly purplish. 

 Sepals longer than the calyx tube, both together less than 7 mm. long. 



3. R. neglectum. 

 Sepals shorter than the tube, both together 10 to 13 mm. long. 



4. R. pringlei. 

 Ovary glabrous ; calyx less than 1 cm. h>ng. 



Bracts obovate, dentate at the broad apex 5. R. dugesii. 



Bracts mostly linear-oblong to lanceolate, usually acute and entire. 

 Lobes of the calyx longer than the tube. 



Leaves glabrous on the upper surface, the margin with gland-tipped 



hairs 6. R. orizabaet 



- • Leaves sparsely pubescent on the upper surface, the margin without 



gland-tipped hairs 7. R. affine. 



Lobes of the calyx equaling or shorter than the tube. 

 ?■ Leaves rounded, truncate, or cordate at base, the sinus shallow and 



open ; glands of the leaves usually sessile ; calyx 5 to 6 mm. 



long 8. R. rugosum. 



Leaves deeply cordate at base, the sinus usually closed, both surfaces, 

 as well as the petioles, with stout gland-tipped hairs ; calyx 8 

 to 10 mm. long 9. R. ciliatum. 



1. Ribes viburnifolium A. Gray, Proc. Amer. Acad. 17: 202. 1882. 

 Baja California ; type from Todos Santos Bay. Southern California. 

 Shrub with straggling branches ; leaves mostly oval or rounded-oval, 2 to 7 



cm. long, bright green and lustrous on the upper surface, glabrous or nearly so; 

 sepals pink, the petals greenish ; racemes few-flowered, equaling or shorter than 

 the leaves; fruit about 6 mm. in diameter. 



2. Ribes ceriferum Coville & Rose, Contr. U. S. Nat. Herb. 8:298. 1905. 

 Cliihuahua and Durango ; type from Momit Mohinora, Chihuahua. 



Shrub, 1 to 4.5 meters high ; leaves suborbicular, 2 to 5 cm. wide, 3-lobed, glab- 

 rous above or nearly so, puberulent beneath; flowers reddish; racemes 3 to 10- 

 flowered, equaling or shorter than tlie leaves; pedicels 6 to 10 mm. long; fruit 

 black, glabrous. " Capulincillo " (Durango). 



3. Ribes neg'lectum Rose, Contr. U. S. Nat. Herb. 8: 298. 1905. 

 San Luis Potosi ; type from Alvilrez. 



Shrub, 1.5 meters high or less ; leaves 2 to 4 cm. wide, 3 or 5-lobed, glandular- 

 pubescent; racemes G to 12-flowered, about as long as the leaves; pedicels 2 to 

 6 mm. long ; fruit black, 8 to 10 mm. in diameter. 



4. Ribes pringlei Rose, Contr. U. S. Nat. Herb. 8: 298. 1905. 



State of Mexico and San Luis Potosi ; type from Sierra de Ajusco. 



Shrub, 1.8 to 3 meters high ; leaves 3 to 7 cm. wide, 3 or 5-lobed, glandular- 

 pubescent ; flowers about 1.2 cm. long, pinkish; racemes drooping, 8 to 12-flow- 

 ered, longer than the leaves; pedicels 6 to 8 mm. long; ovary glandular-pubescent. 



5. Ribes dugesii Greenm. Proc. Amer. Acad. 39:78. 1903. 



Known only from the type locality, mountains of Santa Rosa, near Guana- 

 juato. 



