Rydberg: Notes on Rosaceae 137 



Adenotrichi 

 Rnhus adenotrichos is characterized by its long glandular hairs 

 on the stem, its strongly armed petioles and petiolules, glabrous 

 drupelets and rather broad leaflets, densely tomentose beneath. 

 In the Torrey herbarium there is a duplicate of the type. In the 

 herbarium of the New York Botanical Garden there is one of 

 Liebmann's specimens with still broader leaflets, and shorter 

 glandular hairs, approaching R. costaricanits, with which species 

 this has been confused. Otto Kuntze referred his specimens to 

 that species, but collected, also, specimens of the true R. costari- 

 caniis. The following specimens belong here : 



Vera Cruz: Jalapa, Schiede (type) ; Orizaba, 1853, Fred Mueller 

 3001; near Jalapa, 1900, Pringle 8346 (erroneously named R. 

 coriifoliiis) ; Mirador, 1841-43, Liehmann 1675. 



Oaxaca: Sierra de San Felipe, 1894, Pringle 46QS. 

 Costa Rica: June, 1874, 0. Kuntze; Cartago, August 24, 

 1874, 0. Kuntze 220/. 



Ruhus costaricanus differs from R. adenotrichos in the broader 

 leaflets, more than half as broad as long, the short glandular 

 hairs, scarcely longer than the other pubescence, the dense in- 

 florescence and the few large drupelets. The New York Botanical 

 Garden has received from Copenhagen a duplicate from Professor 

 Oersted's collection. This is duplicated by the specimens collected 

 by Otto Kuntze. 



Costa Rica: Cartago, 1845-48, Oersted 1689; Costa Rica, 

 June, 1874, 0. Kuntze; Turrialva, June 21, 0. Kuntze 2235; 

 Vulcan Irazu and Cartago, June 1874, 0. Kuntze; Hacienda Bel- 

 mira, near Santa Maria de Dota, 1898, Tonduz 11615, 1450; 

 Parrita Grande du Copey, 1898, Tonduz 11726 in part. 



Ruhus Verae-Crucis Rydb., described in the North American 

 Flora, is related to R. adenotrichos, but differs in the pubescence, 

 the leaves being nearly glabrous beneath and the stem with short 

 glandular hairs. The species is only known from the type locality. 

 New shoots were also collected in 1899, Rose &■ Hough 4295. 

 Besides these I have seen only the following specimen, Pringle 8177. 

 Ruhus irasuensis Liebm. The New York Botanical Garden 

 has received from Copenhagen a specimen from Professor Lieb- 

 mann's type collection of this species. The species is more com- 



