132 SAXIFRAGE FAMILY. 



4 I. Leaven alternate. 



1. RIBES. Leaves palmately veined and lobed ; sometimes with narrow stipules 



united with the base of "the petiole. Calyi with its tube cohering with the 

 ovary, and often extended beyond it, the 5 lobes usually colored like the 

 petals. Petals and stamens each 5, on the throat 'of the calyx, the fonner 

 small and mostly erect. Styles 2 or partly united into one ; ovary 1-celled 

 with 2 parietal placentiE, in fruit becominga juicy berry, crowned" with the 

 shrivelled remains of the rest of the flower. 



2. ITEA. Leaves pinnately veined, not lobed. Flowers in a raceme. Calyx 



nearly free from the 2-celled ovary, 5-cleft:. Petals lanceolate, much longer 

 than the calyx, and inserted along with the 5 stamens near its base. Pod 

 slender, 2-ce'lled, splitting through the style and the partition. 



§ 2. Leaves opposite. Calyx-tube wholly coherevt with the top-shaped or hemispherical 

 ovary^ but not at' all extended beyond it. 



* Stamens indefinite, 20 - 40. 



3. DECUMARIA. Flowers small, in a compound terminal cyme. Calyx mi- 



nutely 7-10 toothed. Style thick. Petals 7 - 10, valvate in the bud. Pod 

 small, top-shaped, many-ribbed, bursting at the sides between the ribs. 

 i. PHILADELPHDS. Flowers showy, often corymbed or panicled. Calyx with 

 4 or 5 valvate lobes. Petals 4 or 5, broad, convolute in the bud. Styles 

 3-5, usually somewhat united below. Ovary 3 - 5-celIed, becoming a pod, 

 which splits at length into as many pieces. 



* * Stamens only tioice as many as the petals. 8 or 10. 

 6. DEXJTZIA. Flowers all alike and perfect, more or less panicled, showy. 

 Lobes of the calyx 5. Petals 5, valvate with the edges turned inwards. 

 Filaments flat, the 5 alternate ones longer, commonly with a tooth or fork oa 

 each side next the top. Styles 3-5, slender. Pod 3 - 6-celled. 



6. HYDRANGEA. Flowers in cymes, commonly of two sorts, the marginal ones 



(or in high-cultivated plants almost all) enlarged and neutral, consisting of 

 corolla-like calj^x only (Lessons, p. 84, fig. 167J : the others perfect, with a 

 4 - 5-toothed calyx, as many small petals valvate in the bud, and twice as 

 many stamens with slender filaments. Style 2 - 5, diverging. Ovary 2-5- 

 celled, becoming a small pod which opens at the top between the styles. 



11. Herbs, forming tlie Saxifrage Family proper. Stipules 

 none or confluent with the base of the petiole. - Seed's usually many. 



* Stamens as many as the petals and alternate xoith them, usually 5, and a cluster of 



gland-tipped sterile filgments before each petal: stigmas mostly i, directly over 

 us many parietal placentce. 



7. PARNASSIA. Flower solitary, terminating a scape-like stem ; the leaves 



mostly from the root, rounded, smooth, and entire. Calyx free from the 

 ovary, of 5 sepals. Petals 5, veiny, imbricated in the bud. Styles none. 

 Pod 1-celled, many-seeded. 



* * Stamens only as many as the petals, i orb: no sterile filaments : stylet 2 and 



alternate uiith the placenta or partition. 



8. HEUCHERA. Flowers small, in a long panicle, mostly on a scape. £alvx 



bell-shaped, the tube cohering below with the l-celled"ovary, and continued 

 beyond it, above B-cleft, and bearing 5 small spatulate erect petals at 

 the sinuses. Styles slender. Pod 1-celled, 2-beaked at the apex, opening 

 between tlie beaks. r i r o 



9. BOYKINIA. Flowers in a corymb-like cyme. Calyx 5-lobed, the tube 



cohermg with the 2-celled ovary. Petals 5, convolute i"n the bud, deciduous. 

 Styles 2, short. Pod 2-celled, opening between the two beaks. 

 « # « Stamens twice the number of lite petals or the lobes of the calyx, mostly 10; 

 pod commonly 2-lobed, leaked, or 2, rarely 3-4, nearly separate pods. 

 *- Petals entire, mostly 5. 



10. SAXIFRAGA. Flowers in cymes or panicles, or rarely solitary, perfect. 



Leaves simple or palmately cut. Petals imbricated in the bud. Pod 2- 

 11 AcTti J',?'"'^,;,"'' ^ ''■'""^'y ™°''*') separate P'stils and pods, manv-seeded. 



11. A&iiLBfc. J) lowers m spikes or racemes collected in an ample compound 



pamclo, sometimes polygamous or dioecious. Leaves ample, decompound. 



