SL ——<— Clr CO 
ROSACE.X. 167 
solitary cr somewhat fascicled flowers: calyx-tube long-cylindrical, 
the limb deciduous; petals wanting: carpel usually solitary. 
* * * Herbs: carpels few-many : calyx valvate in the bud, with a set 
of bractlets alternating with the lobes. 
+ Seeds erect from the base of the cell: style terminal, often geni 
culate in the middle. 
7. Geum. Carpels numerous, ona dry receptacle: the elongated style 
in fruit mostly geniculate and articulated near the middle or plumose. 
+ + feed suspended or ascending: radicle superior: style small, 
naked, not geniculate. 
8. Fragaria. Petals broad and conspicuous, sessile: carpels numerous, 
scattered on a large fleshy, becoming pulpy, receptacle; style lateral: 
leaves trifoliolate.. 
9. Comarum. Carpels very numerous, on a large fleshy or spongy 
convex receptacle: stvle inserted below the apex of the ovary: leaves 
pinnate: coarse marsh perennials. 
10. Sibbaldia. Petals narrow and minute, sessile: stamens 5; filaments 
very short, flliform: carpels 5-10, on a dry receptacle: leaves trifolio- 
late. 
11. Potentilla. Petals usually conspicuous, sessile: stamens usually 20 
or more; filaments narrow or filiform: carpels mostly numerous, on a 
dry receptacle: leaves pinnate or digitate; leaflets not confluent. 
12. Horkelia. Petals conspicuous, with claws: stamens 10 or more; fil- 
aments more or less dilated or subulate: carpels usually many, ona 
dry nearly raked receptacle: leaves pinnate; leaflets many, the upper 
ones often confluent. 
: 18. Ivesia. Petals with claws: stamens 5-20; filaments filiform: car- 
pels 1-15, on a dry villous receptacle: leaves pinnate; leaflets cleft or 
parted, often small and very numerous, closely imbricated. 
TriBE Iv. RuBpex&. Calyx open, without bractlets: stamens 
numerous: carpels several or numerous, on a spongy receptacle, 
becoming pulpy-coated achenes in fruit: ovules 2, pendulous, 
but one maturing. 
14. Rubus. Carpels 2-many, crowded on an elevated receptacle, ripen- 
ing into a coherent body of small drupes. 
TRIBE vy. Sprra&#. Calyx campanulate, imbricate or some- 
times valvate in the bud: carpels few, mostly 5, rarely solitary, 
becoming follicles or dehiscent 2-valved pods: styles terminal : 
seeds 1-10 in each carpel, pendulous or ascending. 
§ 1 Carpels becoming 1-seeded achenes. 
15. Holodiscus. Carpels membranaceous, woolly, 1-seeded: shrubs 
with simple lobed leaves without stipules. . 
§ 2 Carpels becoming follicles or 2-valved capsules, usually several- 
seeded. 
* Seeds in ours not known: carpels distinct: ovules 2, one above 
the other, pendulous: herbs with pinnately divided stipulate leaves. 
16. Filipendula. Carpels membranaceous, 1-celled, distinct: leaves 
pinnate, the terminal leaflet large and lobed. 
