116 GROSS ULARIACEAE 



Berry glandular-hispid. 



Berry red; sepals 2-2.5 mm. long, glabrous without. 4. R. glandulosum. 



Berry black or dark-purple: sepals 3-4 mm. long, hairy without. 



Sepals without gland-hairs; berry with a bloom. 5. R. laxiflorum. 



Sepals with gland-hairs; berry without a bloom. 6. R. color adense. 



Hvpantliium-tube well developed, deeply campanulate to tubular. 

 " Fruit glabrous, black. 7. R. americanum. 



Fruit glandular-hispid. 



Hj-pantliium-tube campanulate or urceolate; fruit black or blue. 

 Leaves glabrous or essentially so; fruit globose, with a bloom. 



Hypanthlum-tube greenish wlaite, about 1 mm. long, less than half as long 



as the sepals. 8. R. Wolfii. 



Hypantliium-tube rose-colored or purpUsh, about 2 mm. long, more than 

 half as long as the sepals. 9. R. nevadense. 



Leaves pubescent and usually very glandular; fruit elUpsoid, without a bloom. 



10. R. viscosissimurn. 

 Hj-panthium-tube cyUndric; fruit red. 



" Leaves merelj- giandular-pruinose, not hairy; flowers whitish. 



11. R. reniforme. 

 Leaves decidedly pubescent as well as glandular. 



Bracts cuneate-obovate, the rounded or truncate summit several lobed; 



flowers whitish; styles pubescent. 12. R. cereum. 



Bracts oblong or rhombic, entire or glandular-dentate; flowers pinkish; 



styles glabrous. 13. R. inebrians. 



4. CHRYSOBOTRYA Spach. Flowerinc, Golden, Missouri, or 



Buffalo Currants. 



Sepals less than half as long as the hypanthium-tube. 1. C. odorai\ 



Sepals more than half as long as the hypanthium-tube. 2. C. aurea. 



Family 60. ROSACEAE. Rose Family. 



A. Frxiit consisting of 1-5 dehiscent follicles. 



Carpels alternate with the sepals, or less in number; stipules none or deciduous. 



Carpels 1-5, if more than one more or less xinited below; seeds shining, pear-shaped. 



with a bony coat; endosperm present. 1. Opul.\ster. 



Carpels usually 5, distinct; seeds duU, linear or linear-lanceolate, with a thin coat; 

 endosperm lacking. 

 Stamens inserted on the margin of the hj-panthium; flowers perfect; shrubs or 

 undershrubs with simple leaves. 

 Filaments free; leaves entire or toothed. 



Carpels dehiscent on the ventral suture; shrubs with deciduous leaves. 



2. Spiraea. 

 Carpels dehiscent on both sutures; cespitose tufted undershrubs with 



persistent leaves. 

 Flowers racemose, rarely somewhat paniculate; stamens 20. 



3. Petrophytum. 

 Flowers sohtarv, nearly sessile at the ends of the short branches; 



stamens 10." " 4. Kelseya. 



Filaments united at the base; leaves twice or thrice 3-cleft. 



5. LUETKEA. 



Stamens inserted on the inside of the hypantliium; flowers dioecious: tall herbs 

 with twice or thrice compound leaves. 6. ARUXCUS. 



Carpels opposite to the sepals; stipules present, persistent; leaves pinnately dissected. 



7. Ch.ail\eb.\ti.a.ria. 

 U. Fruits consisting of indeliiscent achenes or drupelets. 



I. Carpels not enclosed in a fleshy hypantliium. 

 a. Fruits of dry achenes. 



1. Ovules 2, one above the other; achenes usually 1-seeded and more or less 

 flattened, arranged in a single circle; slu-ubs with simple leaves. 



8. Sericotheca. 



2. Ovtiles and seeds solitary; achenes usually turgid and, if many, spirally 



arranged, 

 a. Seeds inserted at the distal end of the ovary, i. e., opposite the origin 

 of the style, pendulous or in genera with basal styles ascending; 

 radicle superior. 

 Disk at the mouth of the hypantliium annular or obsolete; leaves and 

 branches alternate. 

 Style articulated to the ovary; hypantliium from campanulate to 

 almost flat, neither contracted at the throat nor closely 

 investing the achenes; flowers cymose or solitary. 

 Stjle not basal. 



Style terminal or nearly so; ovules pendulous and anatropous. 

 Stamens separated from the receptacle by an open space; 

 no indication of an annular tluckening at the base 

 of the filaments. 

 , Hypantliium saucer-shaped to deeply campanulate; 



petals ol)lanceolate to obcordate or cuneate; 

 pistils usually more than 2. 

 Filaments dilated, petaloid. 9. Horkelia. 

 Filaments fiUform. 10. Ivesia. 



