256 MR. W. p. HIERN OX THE PECULIARITIES 



it varies in form from rotate, as in Argostemma^ to long, slender, 

 and narrowly salver-shaped, as in Oxyanthus ; it is subrotate in 

 Khabdostigma and Cuviera, and rather less so, having a short 

 funnel-shaped tube, in Lamprothamnus ; it is calyptriform in 

 CepTiaelis clausa. The tube is curved in some species o^ Psychofria^ 

 especially in the section Chasalia. The lobes are crisped in 



He 



\fli 



gueria, and Cuviera, and eacb lobe is furnished at the apex with a 

 quasi-dorsal horn in some species of Fadogia and Psychotria, and 

 with an elongated club-shaped appendix at the back near the apex in 

 CorynantJie. The lobes are reduced to 3 in number in a few spe- 

 cies of Spermacoce. The aestivation is valvate in the genera Adina, 

 Mitragyne, Uncaria, Hymenodictyon, and Corynanthe, and in the 

 tribes Hedyotidese, Muss^ndese, Vangueriese, Morindese, Psycho- 

 trieae, Psederiese, Anthospermese, and Galieae ; it is reduplicative- 



Helcistocarpa 



He 



fully so in Lepipogon ; and it is dextrosely contorted, as seen from 

 the axis of the flower, in the genera Crossopteryx and Bertiera, 

 and in the tribes Gardenieae, Albertese, and Ixore^. 



7. Differences in the Calyx. 



There is perhaps greater variation in the calyx than in any other 

 organ ; and the calyx furnishes good characters in some cases for 

 the discrimination of genera, but more usually for that of species ; 

 it is, however, of but little value for higher groups. 



The tubes of the contiguous calyces cohere in the genus Sarco- 

 cephalm, and become confluent in fruit in Morinda. In all the 

 genera the calyx is inferior ; but in many the tube is extended 

 above the ovary. The tube is ribbed, at least in fruit, in Pentas, 

 Otomeria, and some other genera ; more or less compressed in 

 Stipularia, &c. 



The limb is developed into a large, dilated, oblique, reticu- 

 lated lamina in Dirichletia ; it is unequally lobed in Pentas, 

 Virecfa, Otomeria, Temnopteryx, Stipularia, Pentanisia, Antho- 



spermum 



One lobe 



is frequently much enlarged as a conspicuous coloured lamina in 



Musscen d 



clavate appendage between the several calyx-teeth, which is soou 

 torn up from its attachment as the corolla grows to its full length. 

 The limb is furnished inside at the base with some fleshy setse in the 

 genera Dictyandra and Leptactina ; in some species of Tricalysia 



<*■ 



