UMBELLIFEBJS. 



103 



hjrium, from the Cape, has the same hollow with an indistinct intra- 

 marginal circle. Opopanax orientalis has been rightly united to 

 Maldbaila ; but, by the intermediation of 0. persicum, it is inseparable 

 from 0. chironium, differing only by its numerous vittse, and from 

 Stenotcmia, which has also two or three vittse in each furrow, and is 

 otherwise very near Pastinaca and Heradeum} 



Johrenia is scarcely more distinct from the Peueedans. The fruit 

 is not so thin, and the sube- 



rose margm itself is thicker ; ^ * 



its general form is more ellip- 

 tical, and the surface of the 

 ovary nearly glabrous, whilst 

 Duavsia has a more orbicular 

 fruit, and the surface of the 

 ovary is hairy. The primary 

 ridges are suberose, tolerably 

 thick, but on the whole not 

 prominent. They are peren- 

 nial herbs of western and 

 temperate Asia. They also 

 connect the Peueedans with 



Tordylium (fig. 95, 96), which has visible sepals, rayed petals, and a 

 fruit often orbicular, coin-like, very compressed, with margin much 

 thickened, whitish, nearly always rugose, more prominent than the 

 primary ridges, which are scarcely visible, , In T. Aucheri, of which 

 the genus Oimosciadium has been made, the rugosity is more marked, 

 and linear traces of the dorsal secondary nervures are perceptible. 

 There are species in which the vittse are solitary in each furrow, and 

 others in which they are multiple. The latter is the case in Polytcenia, 

 which has a fruit with very thick margin and often longer relatively 

 to its size ; it is from North America. In Condylocarpus, the vittse 

 are also numerous, very close, and the central coat of the fruit is 

 very thin. In Hasselquisfda and Ainsworthia, there are fruits near 



95. Fruit (?). 



1 The genus Symphyoloma is distinguished 

 from Jleradevm, of which it has otherwise the 

 fruit with marginal wings a little thicker, by- 

 two somewhat remarkable characters : the ab- 



sence of vittas and of carpophors ; so that 

 the mericarps (one of which is generally sterile) 

 remain united to each other to the end. The 

 plant is a perennial of the Caucasus. 



