238 BOTANY OF SOCOTRA. 



2. ORTHOSIPHON. 



rthosiphon, Benth. in Bot. Reg. sub. t. 1300 ; Bentli. et Hook. Gen. PI. ii. 1174. 



A considerable genus of chiefly Indian and east Indian distribution, but a 

 few species are tropical African, and one reaches Australia. Of the three 

 Socotran species one is endemic, another is only known from Arabia, and the 

 third is an Indian and south-west Asiatic species common at Aden. 



1. O. tenuiflorus, Benth. in DC. Prod. xii. 50. 



Socotra. Abundant. B.C.S. nn. 549, 578. Schweinf. nn. 392, 624, 731 

 in lit. 



Distrib. Arabia. 



2. O. pallidus, Eoyle ; Benth. in Hook. Bot. Misc. iii. 370, and Lab. 

 Suppl. 708, and in DC. Prod. xii. 50 ; Boiss. Flor. Orient, iv. 539. 



Socotra. A common plant. B.C.S. n. 269. 

 Distrib. India and south-west Asia. Aden. 

 The Socotran plants are small and pubescent like the form from Aden. 



3. O. ferrugineus, Balf. fil. in Proc. Koy. Soc. Edin. xii. (1883), 91. 



Suffruticosus tomentoso-pubescens demum gluber ; foliis longe petiolatis late ovatis v. subcordi- 

 formibus rarius obovatis obtusis crenatis utrinque puberulis ferrugineis ; racemis 6-8-floris 

 glandulosis ; corollee tubo calyce triplo-longiore, fauce nuda ; staminibus corolla breviori- 

 bus. 



Suffrutex tripedalis ramulis striatis rigidis puberulis demum glabris fusco-nigris. Folia 

 petiolata deltoidea ovata v. subcordiformia interdum elliptica v. obovata matura 1-lj poll, 

 longa |— f poll, lata apice plerumque angustata saepe rotundata obtusa basi rotundata v. 

 gradatim in petiolum attenuata margine crenato-undulata subrevoluta mollia utriuque 

 velutino-subtomentosa et glandulis rufis vestita supra ferruginea subtus pallidiora 

 juventute albida, petiolo |— ^ poll, longo. Flores in racemos 6-8-rloros axillares 1 poll, 

 longos decussatim ramosos dispositi ; rbacbis glabra pedicellique \ poll, longi glanduloso- 

 puberuli ; bracteolse minutae ovatae sessiles pubescentes ciliatae. Calyx intus glaber extus 

 glandulis rubris capitatis vestitus \ poll, longus fructifer auctus, tubo recto, limbi lobo 

 postico late ovato acuto, lobis anticis 4 acumiuatis. Corolla dilute rosea £ poll, longa 

 extus pubescens et glandulis capitatis vestita intus nuda, tubo recto, limbi lobis 4 posticis 

 brevibus intermediis 2 majoribus. Stamina corolla breviora, filamentis puberulis. 

 Niiculm glabrae leves. 



Socotra. Abundant on the Haghier hills. B.C.S. n. 420. Schweinf. n. 

 518. 



Distkib. Endemic. 



Apparently a distinct species remarkable in its shrubby habit and ferruginous 

 soft foliage. Allied perhaps to O. somalensis, Vatke (in Linnrea xliii. (1880), 

 87), a plant of Somali Land collected by Hildebrandt. 



