BIL TM ORE 



BOTANICAL STUDIES 



71 



Stamens more numerous 



Flowers produced in few, mostly 5-7-flowered corymbs : pedicels and hypan- 

 thium pubescent or glabrous (densely white-tomentose in one species 

 of the Visendse) : leaves serrate, dentate or crenate, either pubescent 

 or glabrous : branches spreading Or ascendding, or occasionally droop- 

 ing, as in the Visendae 

 Leaves sharply serrate and pointed Ignav^e 

 Leaves serrate or coarsely and irregularlv dentate Sorori^e 



Leaves crenate Segnes C. segnis Beadle 25 



Leaves finely dentate or glandular-dentate, usually with several tooth-like 

 lobes Visend^; 



Flowers produced in few, mostly 3-5-flowered corymbs : pedicels and hypan- 

 thium tomentcse or pubescent (glabrous or nearly so in the Attritse) : 

 leaves dentate, crenate or entire (occasionally serrate, as in the Sentae), 

 either tomentose, pubescent or glabrous : branches drooping 

 Fruits globose, subglobose or oval at maturity 

 Ripe pomes averaging i cm or more in diameter 



Leaf borders glandular, either entire, dentate or crenate, often with 

 blunt or sharp tooth-like lobes 

 Inflorescence tomentose or pubescent 



Mature leaves densely tomentose on the lower surface 

 Michauxian^ 



Mature leaves less tomentose, sometimes merely pubescent or 

 glabrous 



Leaf-borders entire or nearly so Integra 

 Leaf-borders toothed and often lobed Dentate 

 Inflorescence glabrous or with a few weak hairs Attrit-<e 

 Leaves serrate or serrate-dentate and incisely lobed Sentae 

 Ripe pomes averaging less than i cm in diameter Anisophyll^e 

 Fruit pyriform at maturity 



Pomes large, i.5-2 cm long and over i cm thick / Colonics 

 Pomes smaller Recurve 

 Flowers solitary or in twos and threes (more numerous in one species) : pedi- 

 cels and hypanthium glabrous or pubescent : leaves small, cuneate or 

 spatulate, or sometimes with abruptly contracted bases : spines usually 

 numerous Lepid^e 



IGNAV^ 



Inflorescence glabrous or with a few weak hairs 



Fruit subglobose or oval 



Spines 2-3. 5 cm long: anthers purple C. ignava Beadle 26 



Spines 35-5 cm long : anthers yellow C. imfar 



Fruit pyriform C, agrestina 



Inflorescence decidedly pubescent C. extraria 



26 B. B. Studies 1 : 32, 1901. 

 2« B. B. Studies I .31, 1901. 



