NOTES ON JAMAICA PLANTS 313 



describes the calyx-lobes in both male and female flowers as " each 

 subtended internally by a minute bract with a glandularly fringed 

 margin." We do not understand this use of the term '* bi-act," and 

 prefer to regard ihis inconspicuous glandular fringe of hairs as repre- 

 senting a disk. This might be regarded as a distinction from Sebas- 

 tiania ; other differences are : the distinct subequal calyx-segments, 

 the leaves sometimes opposite or whorled, and the solitary male 

 flower in the axil of each bract. 



The genus, however, appears to be more nearly allied to the Old 

 World genus Excoecaria, and to differ from this, as conceived by 

 Bentham and Hooker, merely in the indication of a disk, and the 

 presence of a caruncle. The material available of two of the species is 

 incomplete: of D.fasciculata \sq know only the female flower; of 

 2». alpina only male flowers. 



Dendrocousinsia Millsp. Flores dioici, apetali. Discus e 

 fimbriis glandulosis minutis. Fl. 6 : Calycis segmenta 3, parva, 

 distincta, subsequalia, membranacea. Stamina 3 ; filamentis liberis ; 

 antherarum loculi distincti, paralleli, contigui, longitudinaliter de- 

 hiscentes. Ovarii rudimentum 0. Fl. $ : Calyx 3-partitus v. 3-lobus. 

 Ovarium 3-loculare ; styli 3, liberi v. basi brevissime connati, pa- 

 tentes v. revoluti ; ovula in loculi? solitaria. Capsula tridyma, in 

 coccos 2-valves a columella persistente dissiliens. Semina oblonga, 

 levia, strophiolata. 



Arbores ^a.rvi fruticesve. Folia altema, opposita, vel verticillata, 

 breviter petiolata vel sessilia, integra aut denticulata, coriacea v. 

 papyracea, pennivenia. Spicce nunc terminales nunc terminales atque 

 axillares, solitarise aut fasciculatae. Flores sub quaque bractea soli- 

 tarii, cT sessiles, $ sessiles vel subsessiles. Bracteas brevissimse, sub 

 flore utrinque glandulifera?. 



D. spiCATA Millsp. Folia petiolata, elliptica, utrinque rotundata 

 vel emarginata, margine conspicuo revoluto, 3"5-8 cm. 1. Spices 

 J et $ terminales, 6 ad 10 cm. 1., subcrassse, $ 2-3'5 cm. 1. Glan- 

 dules suburceolatse lateribus crassis carnosis. 



Hab. On limestone rocks, Peckham, Clarendon, 2500 ft., Harris^ 

 10,980, 10,981, 11,204, 12,777 ! 



D. FASCicuLATA Millsp. FoUa sessilia, ovata, interdum elliptica 

 vel oblonga, utrinque obtusa, 3-9 cm. 1. Flores $ ad apices ramu- 

 lorum fasciculati, foliis tribus involucrati. Glandules 1-3-ramosse. 



Rab. Dolphin Head, 1800 ft. Harris, 10,266 ! 



D. alpina, sp. nov. Folia petiolata, ovata, interdum elliptica, 

 utrinque obtusa, 2'5-3'5 cm. 1. Spicts d tenninales atque axillares 

 ad nodos vetustiores foliis delapsis. Glandules ut in Z). spicata, aut 

 interdum obsoletae. 



Arbor 18 pad. alta, glabra. Folia ovata vel elliptica, utrinque 

 obtusa, 2-5-3"5 cm. 1., margine in sicco subrevoluto parce denticulata, 

 eglandulosa, papyracea-coriacea, supra reticulato-venosa, infra costa 

 prominenti nervis venisque obscuris ; petioli circa 4 mm. 1. ; stipulse 

 rotundato-deltoideae c. 1 mm. 1. Spicce tS terminales atque axillares 

 ad nodos vetustiores foliis delapsis, bracteas c. 20 gerentes ; ? non 

 visa. Bractece rotundato-ovatae, denticulata3. Glandules cainosae, 

 Journal of Botany. — Vol. 57. [November, 1919.] z 



