124 BOTANY OF SOCOTRA. 



tropical and subtropical regions of Africa, to Madagascar, and the Mascarene 

 Islands ; but one African species extends to Arabia. 



P. Schweinfurthii, Balf. fil. in Proc. Roy. Soc. Edin. xi. (1882), 838. 



Tab. XXXI. 



Suffruticosa glaucescens non glutinosa ; foliis lanceolatis petiolatis acutis integris v. supra 

 obscure dentato-serratis glanduloso-puberulis crassiusculis ; capitulis parvis copiose panic- 

 ulato-corymbosis ; pbyllariis 5-seriatis exterioribus glanduloso-puberulis, interuis glabris ; 

 stylis exsertis ; acheniis pilis adscendentibus vestitis ; pappi setis basi connatis. 



Suffrutex 5-pedalis glaucescens ramulis validis stria tis glanduloso-puberulis. Folia lanceolata 

 petiolata 2|— 8£ poll, longa §-f poll, lata acuta ssepe obliqua basi inrequalia integra v. supra 

 obscure dentato-crenata anguste revoluta crassa copiose glanduloso-puberula glaucescentia 

 pellucido-venulosa nervis prirnariis subprominulis, petiolo \ poll, longo subamplexicauli. 

 Capitula multiflora parva Lemisphserica \ poll. diam. in copiosos paniculatos corymbos 

 terminales disposita ; pedunculi glanduloso-puberuli striati srepeque complanati, ultimi \ 

 poll, longi. Phyllaria 5-seriata, intima lineari-oblonga obtusa glabra margine scariosa, 

 exteriora gradatim minora dorsaliter glanduloso-puberula, extiraa pauca squamifonnia. 

 Flores flavi. $ corollse ligula integra, $ corolla? tubus sursum ampliatus 5-dentatus. 

 Antherce subacutse exsertse. Styli exserti lobis lanceolatis intus planis glabris extus 

 convexis hirtellis. Receptaculum fimbrilliferum. Achenia costata pilis adscendentibus 

 instructa. Pappus setiformis setis basi connatis barbellatis. 



Nom. Vern. Kchass (Schweinf.). 



Socotra. Kischen, at an altitude of about 1800 feet. Schweinf. n. 606. 



Distrib. Endemic. 



A non-glutinous species sent by Schweinfurth. "We did not obtain it. It 

 has close affinity with P. dodonwcefolia, Steetz (in Peters' Mossamb. Bot. 385), a 

 plant of Zanzibar and Madagascar, considered by Oliver and Hiern (in Oliv. 

 Flor. Trop. Afr. iii. 319) as possibly a form of P. arabica, Jaub. et Spach (111. 

 PI. Or. iv. 85. tt. 352, 353), the only species of the genus found in Asia. But 

 the glaucescent non-glutinous character, the larger inflorescences, and the 

 flowers of our plant are sufficiently diagnostic. 



6. PLUCHEA. 



Pluchea, Cass, in Bull. Philom. 1817, and in Diet. xlii. (1826), 1 ; Beiitb. et Hook. Gen. PI. 

 ii. 290. 



A genus of some thirty-five species of shrubby and half-shrubby plants, dis- 

 tributed throughout the warmer regions of America, a few in Africa and Asia, 

 and some in Australia. The three Socotran representatives are endemic. 



1. P. glutinosa, Balf. fil. in Proc. Roy. Soc. Edin. xi. (1882), 838. 



Suffruticosa glutinosa glabra ; foliis oblanceolatis v. lanceolatis breviter petiolatis integris v. in 

 parte superiore dentatis glanduloso-punctatis ; capitulis multifioris parvis 3-4 ad apices 

 ramorura corymbi multo- v. pauciramosi terrainalisv. pseudo-terminalis paniculati sessilibus 

 v. subsessilibus; pbyllariis extimis squamiformibus apiculatis, intimis linearibus subscariosis; 

 antherisobtusis; stylo indiviso; acheniis pilis adscendentibus vestitis; pappo squamifonni. 



