280 NATURAL EISTOBT OF PLANTS. 



Siderodendron, kmenc&nlxoras in which the raphe may be dorsal, the 

 micropyle directed upwards and inwards. The plants of this genus 

 have flowers in cymes, often umhelliform or corymbiform, terminal, 

 more rarely axillary or lateral. 



"We place here doubtfully and as an abnormal type, Stmmpjia 

 maritima (fig. 260, 261), whose bilocular ovary is that of a Coffea, 

 but whose coroUa is imbricate instead of being contorted, and whose 

 stamens are monadelphous and syngenesious, whilst the style is 

 undivided at the summit. It is a small shrub growing on the 

 maritime rocks of the Antilles ; its small leaves are ternate, and the 

 flowers are united in small axillary clusters. 



V. UEAGOGA SERIES. 



The plant which produces the common Ipecacuanha' received from 

 LiNN^us, in 1737, the generic name of Uragoga.^ Its flowers (fig. 

 262-265) are hermaphrodite, regular and ordinarily pentamerous. 

 The receptacle is in the form of a concave sac the margin of which 

 bears the perianth and the cavity contains the ovary. The calyx is 

 gamosepalous, with five divisions ' which soon cease to touch, and 

 the corolla, almost funnel-shaped, is divided above into five lobes 

 valvate* in prefloration. On its hairy throat are inserted five stamens, 

 alternate with its divisions. They are formed each of a short fila- 

 ment and an introrse dorsifixed bilocular anther dehiscing by two 

 longitudinal clefts.^ The ovary, inferior, has two cells, anterior and 

 posterior ; it is surmounted by a glandular 'epigynous entire or bilobed 

 disk, and a style the stigmatiferous extremity of which is divided into 

 two lanceolate-subulate branches. In the internal angle of each 

 ovarian cell is inserted, near the base, an ascending anatropous ovule 

 with ventral raphe and micropyle directed downwards and out- 



' That is the smaller curled Ipecacuanha. ' The cells are independent below. The 



' Gen. (ed. 1) 378, n. 934 (1737).— H. Bn. pollen is white. According to H. Mohl, in 



Adansonia, xii. 324. Cephtelis [Ann. Sc. Nat. ser. 2, ui. 323) it is 



' Often unequal, ciliate. " ellipsoid ; three folds ; in water spherical ; 



* Inflexed at the summit and almost fleshy. three bands and three umbilics." 



