366 TREES OF NORTH AMERICA 



grooved or ridged on the back ; corymbs tomentose or pubescent ; 

 leaves membranaceous to subcoriaceous, broad, rounded or cuneate at 

 the base, at maturity usually pubescent or tomentose below. 



VII. Molles (page 422). 



Fruit oblong, scarlet, V~i' long ; flesh succulent ; nutlets 3-5, prominently 

 grooved and usually ridged on the back ; corymbs glabrous or tomen- 

 tose ; leaves membranaceous or rarely subcoriaceous, oblong, more or 

 less acutely lobed ; anthers rose or purple. 



VIII. Flabellatae (page 442). 



Fruit subglobose to short-oblong, crimson or red tinged with green, about 

 f ' long, its calyx enlarged and prominent ; nutlets 5, prominently 

 ridged on the back ; corymbs rarely few-flowered; stamens 20 ; anthers 

 rose color; leaves membranaceous, on vigorous shoots as broad or 

 broader than long. IX. Dilatatae (page 455). 



*-*-++Leaves cuneate at the base. 



Corymbs many-flowered ; leaves subcoriaceous ; fruit subglobose, rarely ob- 

 long, -'-f ' long ; nutlets 2 or 3, obtuse at the ends, conspicuously ridged on 

 the back ; corymbs glabrous or tomentose ; leaves dark green and lustrous 

 above. X. Coccineae (page 459). 



Corymbs few-flowered (many-flowered in one species of Bracteatce) ; leaves 

 membranaceous. 



Fruit subglobose to oblong, rarely more than -J-' long, greenish or yellow- 

 ish ; nutlets 3-5, rounded at the ends, conspicuously ridged on the back ; 

 leaves subcoriaceous, yellow-green. XI. Iiitricatae (page 462). 



Fruit subglobose, rarely more than ^' long, red or orange-red ; nutlets 

 3-5, slightly grooved on the back ; stamens 20 ; anthers rose color ; 

 leaves incisely lobed. XII. Fulcherrimae (page 466). 



Fruit subglobose to short-oblong, -J'-f ' long; nutlets 3-5, narrowed at the 

 ends, prominently ridged on the back ; corymbs in one species few- 

 flowered, villose ; bracts large and conspicuous ; calyx-lobes f oliaceous ; 

 stamens 20 ; anthers yellow ; leaves coriaceous to subcoriaceous, dark 

 green and lustrous, their petioles sparingly glandular through their 

 whole length. XIII. Bracteatee (page 468). 



--(- -* Petioles, leaves and corymbs conspicuously glandular ; corymbs few-flowered ; 

 fruit subglobose to short-oblong or pyriform, ^-'-f ' long, green, orange, or red, 

 flesh usually hard and dry ; branchlets conspicuously zigzag. 



XIV. Flavae (page 471). 



**Veins of the leaves extending to the points of the lobes and to the sinuses ; corymbs 

 many-flowered ; stamens 20. 



Fruit depressed-globose to oblong, not more than 5-' long, scarlet ; nutlets 2-5, 



obtuse at the ends, prominently ridged on the back ; anthers rose color or 



purple. XV. Microcarpae (page 486). 



Fruit subglobose, $'-$' in diameter, blue or blue-black ; nutlets 3-5, obtuse at 



the ends slightly ridged on the back; leaves dark green and lustrous. 



XVI. Brachyacanthae (page 489). 

 2. Nutlets with longitudinal cavities on their ventral faces. 



Fruit pyriform to subglobose or short-oblong, \' \' long, lustrous, orange or 

 scarlet ; nutlets 2 or 3, obtuse at the ends, prominently ridged on the back ; 

 leaves membranaceous to subcoriaceous, mostly pubescent below. 



XVII. Tomentosae (page 491). 



Fruit short-oblong to subglobose, \' long, black ; nutlets 5, obtuse at the ends, 

 obscurely ridged on the back ; stamens 20 ; leaves subcoriaceous. 



XVIII. Douglasianae (page 502). 



