INTRODUCTORY CHAPTER. 



xli 



Table showing the ordinal composition of the phanerogamic 

 flora of Socotra — continued. 



Orders. 



g 



a 



a 



<v 



o 



o 

 H 



'o 



m 



o 



a 



Fh 



CD 



a, 



O 



u 



a 



a 



H 



OQ 



<U 



'o 



m 



o 



a 



a 



^ a 



S3 o 

 W M 



!« 



o 



c O 



W » 

 o '3 



m g 



5 





Portnlacese, .... 



2 



3 













Primulacese, 











1 



1 













Resedaceae, 











2 



2 





i 



i 







Rhamneae, 











1 



2 









. .. 





Rubiaceae, 











9 



18- 



1 



li 



4 







Rutaceoe, 











1 



1 







1 



X 





Salvadoraceae, 











1 



1 













Santalaceae, 











2 



3 













Sapindacese, 











2 



3 







i 







Sapotaeeas, 

 Serophularineae 











1 

 12 



1 

 13 



1 





l 



4 



X 





Selagine.ne, 











1 



1 



1 





1 



X 





Solanacesa, 











5 



8 













Stereuliaeese, 











2 



2 







i 







Tamariscineoe, 











1 



1 













Thymeleeaceee, 











1 



1 





i 



i 



X 





Tiliaceae, . 











3 



9 





4 



l 







Umbelliferse, 











4 



5 



i 



4 



3 







Urticacese, 











5 



7 





2 



2 







Valerianese, 











1 



1 





1 



1 



X 





Verbenacese, 











5 



6 



i 



3 



2 







Violarieae, 



Zygophylleae, 

 Genus Anomalu 



m, 









3 

 3 

 1 



3 



4 

 1 



i 



1 

 1 



1 



i 





i One species has an endemic 



( variety. 













314 



565 



20 



206 



98 



11 



That Leguminosse should be the most numerously represented family is not 

 surprising, and it owes the position to the large number of species of such 

 genera as Indigo/era, which has nine species, Tephrosia, with six species, 

 Crotalaria and Cassia, each with five species. A large number of the species 

 — sixteen, or nearly one-third — are widely-spread weeds, many of which have 

 doubtless been introduced, but there is an equal proportion of the species 

 endemic ; and there is one endemic genus. There are some interesting points 

 to notice in the plants of the order. Thus, Priotropis socotrana is an endemic 

 species of a genus hitherto known in one species, P. ci/tisoides, Wight and 

 Arn., a plant of the eastern Himalayas. Cylista scariosa, a member of a 

 monotypic genus, has the remarkable distribution of ' Indian Peninsula and 

 Mauritius.' The two species of Lotus, L. ononopsis and L. mollis, constitute 

 along with L. Garcini, a plant of Nile-land, Persia, and Scindh, a section of the 

 genus Lotus of quite exceptional character, and approaching Ononis. Arihro- 

 carpum, the endemic genus, of the tribe Hedysareae, has close affinities with a 

 group of American genera. Dichrostachys dehiscens violates the character 

 of the genus in which it is included, and resembles closely some typical 

 American genera. 



TRANS. ROY. SOC. EDIN. VOL. XXXI. f 



