PHANEROGAMS — PROFESSOR BAYLEY BALFOUR. 107 



A species having a near alliance with C. dichotomum, Benth. and Hook. (Gen. 

 PI. i. 891), a plant of Morocco, which differs, however, in its pinnatisect leaves, 

 its umbels, and its fruit. 



Our plant we gathered only in one locality, and our specimens show con- 

 siderable variation. In some the fruit is quite glabrous and the ridges are 

 prominent, somewhat undulate and rough. An examination of these under a 

 sufficient magnifying power shows that they are covered with a number of 

 irregular projections like undeveloped hairs. 



In another set of specimens (n. 459) these processes have developed into 

 short firm hairs, curved at the apex, and the whole fruit is thus somewhat 

 hispid. 



A third series (n. 564) shows the hispid character of the fruit very clearly, 

 and even in the ovary in a very young condition this feature is exhibited. 

 Along with this character is associated a tendency in the lower leaves to be cut 

 into longer and more linear segments ; the upper leaves are occasionally linear 

 and undivided, and the primary rays of the umbels are elongated and exceed in 

 length the bracts. In all of these characters there is an approach to the next 

 species we describe from the island — C. calcicolum, Balf. fil. 



2. O. (Trachyspermum) calcicolum, Balf: fil. in Proc. Roy. Soc. Edin. xi. 

 (1882), 514. 



Glabrescens nudum erectum, caulibus angulosis ; foliis basalibus longe petiolatis in lacinias 

 longas lineares tripartitis v. bitripartitis, superioribus filiformibus sessilibus ; umbellis longe 

 pedunculatis oppositifoliis 2-4-radiatis, radiis bracteis 2-4 multo longioribus, pedicellis 

 8-12 tenuibus ; fructu ovoideo, jugis nonprominulis hispidis, commissura non multo con- 

 stricta. 



Herba gracilis erecta 9 poll, alta dichotome ramosa depauperata. Caules primum puberuli 

 demum glabrescentes internodiis elongatis. Folia pauca, radicalia circa 2 poll, longa 

 longe petiolata in lacinias ^ poll, longas angustas lineares acutas integras tripartita v. 

 bitripartita glabra, superiora ssepe filiformia basi dilatata amplexicaulia. Umbellce. 

 oppositifolise pedunculis 1|— 2 poll, longis sparsim puberulis ; radii primarii 2-4 in fructu 

 capillares ^ poll, longi striati bracteis 2-4 lineari-filiformibus berbaceis puberulo-ciliatis 

 triplo-longiores, secundarii 8-12 in fructu £ poll, longi bracteolis breviores. Petala 

 ciliata acumine integro acuto. Fruchis dense hispidus jugis non prominulis, valleculis 

 uuivittatis, commissura constricta sed non angustata ; stylis deflexis, stylopodio conico. 



Socotra. Very common on the limestone plains near the sea. B.C.S. nn. 

 190, 357. 



Distrib. Endemic. 



A very slender annual, greatly depauperate, which differs from the type of 

 the last species in habit, in its angular and purple stems, its few linearly cut 

 leaves, the few primary branches of the umbels much longer than the bracts, 

 and in its densely hispid fruit without a much narrowed commissure. 



As I have mentioned, under the last species there are forms of it which 



