PHANEROGAMS— PROFESSOR BAYLEY BALFOUR. 273 



An interesting species of the section Adenoropium, which contains most of 

 the old world forms. It differs from the majority of species in its unicostate 

 more or less lanceolate leaves. Specimens, not sufficient for complete descrip- 

 tion, were sent to Kew Herbarium some years ago by Wykeham Perry. 



The plant yields a quantity of gum-resin, and the bark is used on the 

 island for tanning. 



One of our specimens, n. 13, is of a young seedling collected near Galonsir. 

 It shows a great thickening on the primary stem at the collar, and the leaves 

 are more longly petiolate than in the adult. 



7. CROTON. 



Croton, Linn. Gen. n. 1083 ; Benth. et Hook. Gen. PI. iii. 293. 



A vast genus of warmer regions of both worlds. Four species occur in 

 Socotra, and all belong to the same section of the genus and are endemic. 



1. C. (Eluteria) sarocarpus, Balf. fil. in Proc. Roy. Soc. Edin. xii. (1883), 

 94. Tab. XCI. 



Arbor ; foliis ovatis penniveniis longe petiolatis lamina basi patellari-glandulosa subtus 

 avgenteo-lepidota ; stipulis subulatis ; inflorescentiis psuedoterminalibus ; floribus dioicis ; 

 5 racemis multifloris, alabastris globosis, staminibns ultra 20 ; $ umbellis paucifloris, stylo 

 bis bifido, capsula dense setigera, seminibus levibus. 



Arbor 20-pedalis ramis rugosis verrucosis ultimis angulatis lepidotis. Gemmae rafae. Folia 

 magnitudine valde ludeutia plerumque 3-4 poll, longa nonnunquani 7 poll. 1-1^ poll, lata 

 sed in exemplis maximis stepe 3 poll, longe petiolata ovata v. elongato-ovata apice 

 gradatim attenuata obtusa basi cordata v. rotundata v. subtruncata v. rarius late cuneata 

 margine subi'epanda coriacea pennivenia nervo medio subtus prominente supra pilis 

 stellatis vestita subtus dense lepidota argentea albida nitida lepidibus plurimis parvis 

 centro minute rubro-glanduloso margineque stellato-fimbriato albido sed paucis hinc inde 

 distributis omnino fuscis centroque prominente rubro; petiolus plus minusve angulatus 

 striatus lepidotus sub lamina glandulosus glandulis stipitatis umbilicatis 1-2^ poll, longus 

 lamina parum brevior. Stipvlai minutse subulatae. Fl. in racemos multifloros breves 

 termiuales dispositi, pedicellis tenuibus 1-1^ poll, longis lepidotis, bracteis inconspicuis. 

 Akibastri globosi. Calyx l poll, longus 5-lobatus, lobis ovatis apice inflexis et incrassatis 

 dorsaliter tomentoso-lepidotis lepidibus centro glauduloso-fuscis margiue intus villosis. 

 Gorollcc petala membranacea ligulata nervo medio conspicuo margine ciliato-villosa revoluta 

 apice recurva. Stamina exserta ultra 20. Receptactdum villosum. Fl. $ in cymas 

 umbellatas paucifloras pseudoterminales conferti, rhachi angulata £ poll, longa valida, 

 pedicellis \ poll, longis dense lepidotis, bracteolis inconspicuis. Sejmla 3 inpequalia non 

 accrescentia. Corollce petala anguste linearia lanceolata. Stylus bis dichotome divisus. 

 Fructus \- § poll, longus dense setigerus setis validis -j^ poll, longis apice pilis penicellatis 

 radiatim coronatis. Semina levia -^ poll, longa carunculis fuscis transverse oblongis. 



Nom. Vern. Mitra or Mittera. This vernacular name is apparently applied 

 to all species of Crolon. 



TRANS. ROY. SOC. EDIN. VOL. XXXT. 2 M 



