FLOWERING PLANTS AND FERNS OF ARIZONA 385 



1. Pedicels not jointed: bracelets, if any, at base of the pedicel and covered 



by the bract: fruit not disarticulating: spines present at the nodes 



of the stem, the stems often also bristly: hypanthium always deep; leaf 



blades in all of the species very similar in shape andlobation: Subgenus 



Grossularia (7). 



7. Styles hairy below; hypanthium, calyx lobes, and ovary glabrous; stems 



sometimes with a few short bristles: spines few or none, seldom as much 



as 10 mm. long: leaf blades up to 6 cm. wide: flowers (including the 



ovary" 7 to 9 mm. long; calyx lobes 1 to 2 times a> long as the hypanthium; 



berry at maturity wine-colored, smooth, about 8 mm. in diameter. 



7. R. I.VERME. 



7. St vies not hairy, glabrous or puberulent; hypanthium and calyx lobes 



pubescent (8). 



8. Ovary densely bristly: leaf blades up to 4 cm. wide: berry densely spiny, 



at maturity 10 to 15 mm. in diameter (excluding the spinesj, dark 



purple: stems without bristles, glabrous or puberulent when young: 



nodal spines stout, up to 12 mm. long, often somewhat curved: 



flowers (including the ovary) 15 to 18 mm. long: calyx lobes narrow, 



longer than the hypanthium, often twice as long__ 8. R. pixetorum. 



8. Ovary not bristly, the hairs, if any, soft, glandular or nonglandular; leaf 



blades not more than 2 cm. wide; berry not spiny, less than 10 mm. 



in diameter (9). 



9. Hypanthium as wide as or wider than long: berry at maturity yellow 



(sometime* purple?), copiously soft-pubescent: leaves, young stems, 



etc., almost tomentose: steins without bristles; spines straw-colored, 



mostly straight and slender, up to 2 cm. long: flower when dry 



(including the ovary) not more than 7 mm. long_ 9. R. velutixum. 



9. Hypanthium loneer than wide: berry black or dark red, commonly 



glabrous: leaves, etc., glabrous or moderately pubescent; stems 



sometimes bristly but commonly not so; spines yellowish brown 



to brownish gray (10). 



10. Calyx lobes and hypanthium white: hypanthium 4 to 6 mm. long. 



10. R. LEPTANTHUM. 



10. Calyx lobes and hypanthium yellow: hypanthium 2 to 3 mm. Ions. 



11. R. QfEECETORrM. 



1. Ribes montigeDumMcClatehie. Erythea 5: 38. 1897. 



San Francisco Peaks and Navajo Mountain (Coconino County). 

 White Mountains (Apache County") 6,500 to 11,500 feet. June to 

 August. Montana to British Columbia, south to New Mexico, 

 northern Arizona, and California. 



Gooseberry currant. 



2. Ribes aureum Pursh, Fl. Amer. Sept. 164. 1814. 



Navajo and Yavapai Counties to Cochise County. 5.000 to 6.000 

 feet. March to June. South Dakota to Assiniboia and Washington, 

 south to New Mexico. Arizona, and California. 



Variously known as golden, Missouri, and buffalo currant, often 

 cultivated as an ornamental. The showiest wild currant, with 

 bright-yellow, fragrant flowers. 



3. Ribes wolfii Rothr., Amer. Nat. 8: 358. 1874. 



Kaibab Plateau (Coconino County . White Mountains (Apache 

 County), Pinaleno Mountains (Graham County). 8.500 to 11.500 feet. 

 moist woods and springy places. May to August. Colorado, Utah. 

 New Mexico, and Arizona. 



4. Ribes viscosissimum Pursh, Fl. Amer. Sept. 163. 1814. 

 Grand View, Grand Canyon (Baihy 1025). about 7.000 feet. May 



to July. Montana to British Columbia. Colorado, northern Ari- 

 zona, (?) and California. 

 Stickv currant. 



