PHANEROGAMS — PROFESSOR BAYLEY BALFOUR. 293 



D. Oinnabari, Balf. fil. in Trans. Roy. Soc. Edin. xxx. (1882), 623. 



Arborea robusfca rainosa; foliis ensiforniibus patento-erectis rigiclis supra concavis ; paniculis 

 glabris ramulis penulfcimis elongatis compressis, pedicellis validis brevibus, bracteolis longis 

 acuminatis ; perianthio sordido segraentis apice uncinatis ; filamentis antheris duplo- 

 longioribus ; stigmate trilobate 



Arbor 25-pedalis trunco crassitie 3-ped. attirigente cicatricibus foliorum delapsorum notato 

 apice copiose ramosa urnbraculiformis. Folia 1-2-pedalia 1-1£ poll, lata -}—^ poll, crassa 

 sessilia ad apices ramorum validorum conferta pateato-erecta firma sed in plantis juvenili- 

 bus frequenter longiora et ssepe subrecurva basi amplexicaulia et piscis caudse bomocercse 

 similitudine expansa ibique 4 poll, lata rubescentia sursum gradatim attenuata ensiformia 

 supra concava infra jugo medio prominente lateribus convexis apice trigona obtusa 

 punctata ecostata glabra glauco-viridia margine concoloria. Paniculi glabri pseudo-termin- 

 ales inter folia evoluti 1-2^-pedales multo-ramosi ramis et ramulis divaricatis ante- 

 penultimis compressis subtortis striatis 9-12 poll, longis penultimis contractis 2-4-floris ; 

 pedicelli validi \ poll, longi supra medium articulati ; bracteolse membranaceai longae 

 acuminatfe. Perianthium sordidum \ poll, longum segmentis oblongis vix connatis apice 

 uncinatis. Stamina inclusa filamentis subulatis ; antherae oblongae filamentis dimidio 

 breviores. Ovarium oblongum stipite valido ; stylus ovario aequilongus stigmate trilobato. 

 Baccce aurantiacse £ poll. diam. 



Nom. Vern. Of the tree— Kharya (B.C.S.). Of the resin— Edah (Wellst, 

 B.C.S.). 



Soeotra. Common on the hills. B.C.S. n. 11. Schweinf. mi. 565, 785. 

 Perry. 



Distrib. Endemic. 



One of the most interesting plants of the island. Like D. Draco, (Linn. 

 Syst. Nat. (1767), ii. 246); Baker in Journ. Linn. Soc. xiv. (1875), 527), 

 from the Canary Islands, D. Ombet, Kotsch. and Peyr. (Plant. Tinneanse, 47), 

 from Nubia, and D. schizantha, Baker (in Trim. Journ. Bot. vi. (1877), 71), from 

 Somali Land, this is a resin-producing tree. The four species are by this 

 character marked out from others of the genus, and they also agree with one 

 another in general habit, which is that of a more or less forkedly-branching 

 thick-stemmed tree, with leaves forming dense tufts at the ends of the stout 

 ultimate branches, which are arranged so as to form a larger or smaller 

 umbrella-crown. 



These four species which thus form a distinct group in the genus, and one 

 of a very ancient type, are quite distinct one from the other. Taking D. 

 Cinnabari as described above, D. Draco differs in its compressed ensiform 

 leaves, smaller bracteoles, greenish perianth the segments of which are not 

 uncinate at the apex, anthers relatively to the filaments shorter, and the capitate 

 stigma. D. Ombet has a less robust habit, more slender and shorter ante- 

 penultimate branches in the panicle, longer pedicels, non-acuminate bracteoles, 

 and more delicate perianth. This latter is the species most nearly allied to our 



