PHANEROGAMS— PROFESSOR BAYLEY BALFOUR. 43 



2. ZYGOPHYLLUM. 



Zygophyllum, Linn. Gen. n. 530 ; Benth. et Hook. Gen. PI. i. 266. 



A considerable old-world genus, having its headquarters at the Cape and in 

 Australia, and in the saline regions and deserts of western Asia and north 

 Africa. Both Socotran species have a wide distribution. 



1. Z. simplex, Linn. Mant. 68 ; DC. Prod. i. 705 ; T. Anders, in Journ. 

 Linn. Soc. v. (1860), Suppl. 13; Boiss. Flor. Orient, i. 912; Oliv. Flor. Trop. 

 Afr. i. 285 ; Edgew. and Hook. fil. in Hook. Flor. Brit. Ind. i. 424. 



Z. portulacoides, Forsk. Fl. iEgypt. Arab. 88, t. xii, B. 



Socotra. Common on the plains. B.C.S. n. 660. 



Distrib. Deserts from Cape de Verde Islands through north tropical 

 Africa and Arabia to Scinclh ; also Cape of Good Hope. 



2. Z. album, Linn. fil. Dec. i. t. 6 ; DC. Prod. i. 706 ; Boiss. Flor. Orient, 

 i. 915 ; Oliv. Flor. Trop. Afr. i. 286 ; Sibth. Flor. Grsec. t. 371. 



Socotra. On sandy spots near the shore at Galonsir and elsewhere. 

 B.C.S. n. 112. 



Distrib. Same as the last species, but not spreading so far eastwards. 



3. FAGONIA. 



Fagonia, Linn. Gen. n. 531 ; Benth. et Hook. Gen. PI. i. 267. 



A small genus of very variable species, having a world-wide distribution. 



F. cretica, Linn. Sp. 553 ; DC. Prod. i. 704 ; T. Anders, in Journ. Linn. 

 Soc. v. (1860), Suppl. 11 ; Boiss. Flor. Orient, i. 905 ; Oliv. Flor. Trop. Afr. i. 

 287 ; Bot. Mag. t. 241. 



var. arabica, T. Anders, (loc. cit.); Oliv. (loc. cit.). 



F. arabica, Linn. Sp. 553 ; DC. Prod. i. 704 ; Boiss. Flor. Orient, i. 907 ; Edgew. and Hook. fil. 

 in Hook. Flor. Brit. Ind. i. 425. 



Socotra. Common everywhere on the plains. B.C.S. n. 93. Nimmo. 



Distrib. Of the species — cosmopolitan. Of the variety — Egypt and 

 Arabia. 



Another of the plants sent home by Nimmo. 



var. socotrana, Balf. fil. in Proc. Roy. Soc. Edin. xiii. (1883). 



Omnino inarmata glauca raniis striatis scabrido-hispidis ; foliis unifoliatis crassis ovato-ellipticis 

 v. ellipticis v. rotundatis v. suborbicularibus §-l£ poll, longis jp 2 jj poll, latis ; stipulis 

 minutis ^ P oU - l° n gi s subulatis submembranaceis ; pedunculis sub capsulis dilatatis et eis 

 subsequilongis ; sepalis subpapillosis ; petalis albidis v. purpureis ; capsulis pubescentibus ; 

 seminibus obsolete punctulatis. 



Socotra. Abundant. B.C.S. n. 202. 

 Distrib. Endemic. 



