WOOTON AND STANDLEY FLORA OF NEW MEXICO. 301 



in every respect, there is practically no doubt that the two are part of the same col- 

 lection from near the type locality of P. argyrocalyx. Evidently some mistake was 

 made in sending out the specimen which became the type of the new species, resulting 

 in the mixing of labels. 



4. Philadelphus argenteus Rydb. N. Amer. Fl. 22: 171. 1905. 

 Type locality: Fort Huachuca, Arizona. 



Range: Southeastern Arizona and southwestern New Mexico. 

 New Mexico: Burro Mountains; Santa Rita; Animas Peak. 



62. GROSSULAKIACEAE. Gooseberry Family. 



Erect or spreading shrubs, often with bristly or spiny stems; leaves alternate, 

 simple, petiolate, broadly ovate to rotund, usually palmately veined, more or lesa 

 lobed aud toothed; inflorescence terminal on short, lateral, sometimes leafless branches, 

 racemose, or the raceme reduced to a single flower; flowers regular, perfect (rarely 

 unisexual); hypanthium elongated, short, or obsolete; sepals, petals, and stamens 5, 

 alternate; ovary 1-celled; fruit a berry. 



KEY TO THE GENERA. 



Stems without spines or bristles (except in R. montigenum ) ; 



pedicels jointed beneath the ovary; fruit breaking 



from the pedicel 1. Ribes (p. 301). 



Stems with nodal spines, with or without extranodal 



bristles; pedicels not jointed beneath the ovary; 



fruit not breaking from the pedicels 2. Grossularia (p. 303). 



1. RIBES L. Currant. 



Unarmed shrubs (R. montigenum spiny and bristly) with palmately veined, mostly 

 lobed leaves; flowers in several-flowered racemes; pedicels jointed beneath the ovary; 

 ovary not spiny, sometimes glandular; hypanthium tubular to campanulate, sometimes 

 obsolete; fruit breaking from the pedicel. 



KEY TO THE SPECIES. 



Stems armed with spines; leaves pubescent or glandular-hairy; 



berries bright red 1. R. montigenum . 



Stems unarmed; leaves pubescent or glabrous; berries red or black. 



Hypanthium obsolete, the sepals slightly united at the base... L'. R. coloraderue, 

 Eypanthium evident (very short in R. wolfii). 



Anthers with a conspicuous cup-shaped apical gland. 



Hypanthium 3 or 4 times as long as broad; fruit red.. 3. R. inebrious. 

 Eypanthium less than twice as long as broad; fruit 



black 4. R. mescalcrium. 



Anthers with at most a mere callus at the apex. 



Hypanthium smooth, 3 or more times as long as thick; 



leaves involute in vernation - r >. R. aureum. 



Hypanthium hairy, less than 3 times as long as broad ; 

 leaves plicate in vernation. 

 Leaves with amber-colored glands on both sur- 

 faces; hypanthium and calyx together 10 



mm. long 6. R. amaicanwn. 



Leaves without glands on the upper surface; 

 hypanthium and calyx together 5 mm. Long 

 or less 7. R, wolfii. 



