Calyx glandular margined, fruit more than 8 mm. (1/8 inch) thick; leaves not trilobate. IV. Rotundifoliæ. 9 C. chrysocarpa. Calyx lobes not glandular margined; fruit 4-8 mm. (1/16-1/8 inch thick); leaves often trilobate towards the apex. V. Virides. Fruit bright red, glaucous, 4-6 mm. (1/6-1/4 inch) thick; leaves serrate. 10 C. viridis. Fruit dull dark red, 6-8 mm. (1/4-1/3 inch) thick; leaves coarsely serrate. 11 C. nitida. II. Leaves broadest at the base. a. Leaves 1.5-6 cm. (1/2-2-1/2 inches) long and wide, membranaceous; calyx lobes usually entire. Leaves yellow-green, often slightly pubescent; fruit soft at maturity. VI. Tenuifoliæ. Fruit ellipsoidal, ovoid or pyriform. 12 C. macrosperma. Fruit compressed, globose or subglobose. 13 C. basilica. Leaves blue-green, glabrous; fruit hard at maturity. VII. Pruinosæ. Leaves elliptic-ovate. 14 C. Jesupi. Leaves usually cordate. Fruit conspicuously angled, strongly pruinose. 15 C. rugosa. Fruit without conspicuous angles, slightly pruinose. 16 C. filipes. Leaves usually cuneate. Leaves deltoid. 17 C. Gattingeri. Leaves ovate. 18 C. pruinosa. b. Leaves 3-10 cm. (1-4 inches) long and wide; calyx lobes usually serrate. VIII. Coccineæ. Mature leaves usually glabrous above; young foliage bronze-green; anthers pink. Corymbs and fruit glabrous. 19 C. coccinioides. Corymbs and fruit pubescent or tomentose. 20 C. coccinea. Mature leaves tomentose above; young foliage yellow-green; anthers yellow. 21 C. mollis. B. Leaves conspicuously deltoid-cordate. IX. Cordatæ. 22 C. Phænopyrum.