66 



Rydberg: Notes on Rosaceae 



II. CiNNAMOMIAE. 



ones occasionally with one or two lobes; foliage not 

 sweet-scented. 

 Flowers solitary, bractless; achenes inserted only in the 



bottom of the hypanthium; leaflets very small. III. Minutifoliae. 



Pistils few; styles deciduous with the upper part of the hypan- 

 thium which falls off like a ring. IV. Gymnocarpae. 



I. Caninae 



A climbing rose. 



I. R. riibiginosa. 



II. CiNNAMOMIAE 



Flowers mostly solitary; petals usually 2.5 cm. long or more; 



hypanthium in fruit 12-20 mm. thick; prickles straight. 



Prickles stout, more or less flattened below, ascending; 



petioles, rachis, and lower surface of the leaflets not 



pilose, except sometimes on the veins. 



Leaflets very thin, pale and slightly glandular-puber- 



ulent, but not muriculate beneath. 

 Leaflets thicker, dark-green on both sides, conspicu- 

 ously glandular-muricate beneath. 

 Prickles weak, almost terete; petioles, rachis, and lower 

 surface of the leaflets distinctly pilose. 

 Flowers mostly corymbose; if solitary, the petals 2 cm. long 

 or less; fruit rarely more than i cm. thick. 

 Prickles more or less curved; leaves more or less softly 

 villous or pilose. 

 Leaflets not at all glandular beneath, mostly simple- 

 toothed; hypanthium with a distinct neck, often 

 ovoid. 

 Leaflets conspicuously glandular beneath, more or less 

 double-toothed. 

 Hypanthium with a distinct neck. 



Leaflets broadly oval or obovate; fruit sub- 

 globose or broadly obovoid. 

 Leaflets elliptic; fruit elongate-ellipsoid. 

 Hypanthium depressed-globose, without a neck; 

 leaflets elliptic or narrowly oval. 

 Prickles straight or nearly so. 



Hypanthium normally not bristly. 



Hypanthium globose or nearly so; neck obsolete 

 or inconspicuous. 

 Sepals lanceolate, with long caudate-attenuate 

 or foliaceous tips, more than i cm. long. 

 Stipules, petioles, and rachis copiously 

 glandular; leaflets orbicular or rounded- 

 ovate, often double-toothed with gland- 

 tipped teeth, more or less glandular- 

 granuliferous beneath. 

 Leaflets very thin; prickles slender. 



2. 



3- 



4- 



R. niiikana. 

 R. muriculata. 

 R. Brownii. 



5. R. californica. 



