344' NATURAL HISTORY OF PLANTS. 



of five unequal enclosed stamens with short and rounded anthers. 

 The capsule is loculicidal, and the imbricate seeds are winged top and 

 bottom. They are trees and shrubs of tropical America, with opposite 

 leaves, and the inflorescences, axillary and terminal, are in very 

 ramified clusters of cymes. 



This series is also represented by several old-world genera, some 



of, which have been referred to the genus Cinchona, as Hymenopogon, 



from the Himalaya, having the septicidal capsule of Gascarilla, with 



winged seeds, a valvate corolla with the internal hairs reversed, and 



flowers in terminal corymbiform cymes, the bracts of which may 



present exactly the same characters as the foliaceous sepal of 



Macrocnemum ; Hymenodictyon, from India and tropical Africa, with 



short pedicels (so that the divisions of the inflorescences become 



spikelike), bracts also foliaceous, petiolate and reticulate, and fruit 



capsular and loculicidal, not septicidal. Corynanthe is a tree of 



Guinea with loculicidal capsule, winged seeds, valvate corolla; but 



the lobes of the latter are furnished near the summit with a long 



narrow club-shaped appendage, and the secondary divisions of the 



mixed inflorescence are nearly verticillate. Danais, exclusively 



domiciled in the eastern tropical African isles, consists of climbing 



shrubs with polygamo-dioecious flowers. The corolla is valvate, with 



five stamens, exserted in the males, short and enclosed or absent in 



the females. The style is short with bare branches in the male fiowers, 



long exserted and with branches terminated by a papillose cone in the 



female. The fruit is a short loculicidal capsule, and the seeds, 



imbricate and peltate, are bordered by a circular wing. The floral 



cymes are compound and corymbiform, axillary. 



There is one genus, Manettia, in America whose stems are also 

 slender and volubile, and the inflorescences, short an,d axillary, 

 sometimes few- or one-flowered. But they are herbaceous or sub- 

 shrubby plants. The flowers are 4, 5-merous, with a corolla often 

 tubular, limb valvate, and an ovary with two multiovulate cells, 

 surmounted by a long slender style, entire or bifid. The capsule is 

 septicidal ; the seeds imbricate and surrounded by a dentate wing. 

 The placenta, erect or ascending, is supported by a short foot, which 

 connects these plants with the Oldenlandiece. In Alseis, likewise 

 inhabiting tropical America, the flowers are also polygamous, with 

 a placenta attached to the ovarian coat by a contracted point ; but 

 it is descending, and the flowers are in clusters with short pedicels, 



