PHANEROGAMS— PROFESSOR BAYLEY BALFOUR. 137 



Pegolettia differs technically from Pulicaria in its homogamous heads, 

 anther-tails setaceously branched, and in the free palese of the outer pappus. 

 In the first of these points our plant agrees with Pegolettia, but not in the 

 others. It further differs from Pegolettia in its achenes in the same degree as 

 it does from Pulicaria ; also, Pegolettia wants the flattening of the setae of the 

 inner pappus. In general facies, too, species of Pegolettia are very different. 



In Grantia are included some south Persian species which our plant 

 resembles a good deal in general characters. But the absence of the foliaceous 

 outer involucral bracts, so striking a feature in this genus, along with the connate 

 palese of the outer pappus, and the achenes separate it readily. 



Another allied genus of this region, Iphiona, might lay some claim to the 

 plant, but it has setaceous outer pappus. 



In selecting Pulicaria as the genus for this plant, I have been influenced 

 by its possessing a preponderance of conformable characters, but the species is 

 decidedly an aberrant one. 



We know this plant now only as endemic in Socotra, but its distribution 

 and profusion there are such as to forbid one regarding it as a plant that is 

 peculiar to the island. When the adjacent shores of the mainland are carefully 

 examined, I have little doubt this plant will be found, and further exploration 

 of these regions will also certainly bring to our knowledge many forms which 

 will throw light upon the limits of these nearly allied Inuleaean genera. With 

 such knowledge it will then be possible to determine more precisely the true 

 position of this very interesting plant. Should it be the type of a new genus, 

 or of a section of another genus, its chief claim for recognition will rest on the 

 form and pattern of its achenes. 



3. P. vierseoides, Balf. fil. in Proc. Roy. Soc. Edin. xi. (1882), 840. Tab. 

 XXXIX. 



Fruticosa cinerea habitu Vieraeas ; foliis obovatis crasse coriaceis glandulis instructis et arachn- 

 oideis ; capitulis radiatis solitariis pseudo-terminalibus longe pedunculatis ; phyllariis 

 pauciseriatis glanduloso-puberulis exterioribus gradatim minoribus extimisque saepe 

 foliaceis magnis ; antherarum caudis elongatis simplicibus connatis ; acheniis subteretibus 

 10-costatis apice hirsutis ; pappo exteriore cupuliformi paleaceo-lacero, interioribus setis 

 complanatis. 



Frutex ramosus habitu Vieraeas v. Psiadiae ramulis cicatricosis terminalibus glanduloso-puber- 

 ulis brunneis interduni arachnoideis. Folia obovata v. oblanceolata l|-2-|- poll, longa 

 l|-f poll, lata v. minora acuta v. obtusa basi gradatim in petiolum anguste alatum 

 amplexicaulem axilloque villoso attenuata margine obscure dentato-serrata parum 

 revoluta crasse coriacea nervis prominulis plus minusve arachnoidea saepius juvenilia 

 compacte albido-lanata sub pilis copiose glandulosa. Capitula magna multiflora § poll, 

 diam. radiata solitaria pseudoterminalia versus extremitatem ramorum inter folia expansa, 

 pedunculis 2 poll, longis ultra folia projectis striatis glanduloso-puberulis saepe 1- v. pluri- 

 bracteatis. Phyllaria 3-4-seriata extus glandulis stipitatis instructa pilisque longis paucis 

 arachnoideis vestita, interiora linearia acuminata marginibus scariosis, exteriora herbacea 

 TRANS. ROY. SOC. EDIN. VOL. XXXI. S 



