132 SAXIFRAGE FAMILY. 



1. Leaves alternate. 



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



united with the base of the petiole. Calyx with its tube cohering with the 

 ovary, and often extended beyond it, tin; 5 lobes u-ii:iliy colored like the 

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

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

 with 2 parietal placentae, in fruit becoming a juicy berry, crowned' with the 

 shrivelled remains of the rest of tiie flower. 



2. ITKA. 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-celled, splitting through the style and the partition. 



2. Leaves opposite. O'lyx-tube wholly cuhen-iit n-iih llie top-shaped ur hemispherical 

 in'.try, but not at all extended beyond it. 



* Stamtns indtjt?tite, 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. 



4. PH1LADELPHUS. Flowers showy, often corymbed or panicled. Calvx 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-celled, becoming a pod, 

 which splits at length into as many pieces. 



* # Stamens only twice as many as the petals. 8 or 10. 



5. DEUTZIA. Flowers all alike and perfect, more or less panicled, showy. 



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

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

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



6. H\ DRANGEA. Flowers in cymes, commonly of two sorts, the marginal ones 



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

 corolla-like calyx only (Lessons, p. 78, fig. 214) : 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. 



II. Herbs, forming the SAXIFRAGE FAMILY proper. Stipules 

 none or confluent with the base of the petiole. Seeds usually many. 



* Stamens as many as the petals and alternate with (hem, usually o, and a cluster of 



gland-tipped sterile filaments before each petal : stiym/is inost/i/ I, directly over 



tig iitiuii/ 1 a irietal placentae. 



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



nio-tly from the root, rounded, smooth, and entire. Calvx 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, 4 or 5 : no sterile f laments : styles 2 and 

 alternate with the placenta or partition. 



8. HKUCHERA. Flowers small, in a long panicle, mostly on a scape. Calyx 



bell-shaped, the tube cohering below with the 1-celled* ovary, and continued 

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

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

 between the beaks. 



9. BOYKIMA. 1 lowers in a corymb-like cyme. Calyx 5-lobed, the tube 



cohering with the 2-eelIed ovary. Petals 5, convolute in the bud, deciduous. 

 Style^ 2, short. I'od 2-celled, opening between the two beaks. 



* * * Stami-ns tii-iri- the number of the petals or the lubes <>f the calijx, mostly 10; 



pud commonly 'l-lobed, beaked, or 2, rnrtfy 3-4, nearly st/iitnit'e puds. 



H- Pi till.-; uitirr, iiiustly 5. 



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



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

 celled below, or 2 (rarely more) separate pistils and pods, many-seeded. 



11. ASTILI'.K. Flowers in spikes or racemes collected in an ample compound 



panicle, sometimes polygamous or dioecious. Leaves ample, decompound 



