Plate 2570. 



HEVEA SPRUCEANA, Mudl. Arg. 



EUPIIORBIACE.E. 



H. spruceana, Muell Arg. in Linncea, xxxiv. p. 204, et in DC. 



Prodr. xv. 2, p. 717 ; inter species foliis glabris inflorescentiie ampli- 

 tudine inaignis. 



Arbor elata, ramis floriferis glabris. Folia ad ramorum apices con- 

 fertissima, glabra, petiolo 4-8 poll, longo apice 2-glanduloso ; foliola 

 distincte petiolulata, tenuis, papyracea vel forsan demum subcoriacea, 

 ovato-lanceolata, 3^-8 poll, longa, acute vel subobtuse acuminata, basi 

 cuneata, discoloria, supra subnitida, costa impressa, subtus pallida, 

 venis primariis utrinque circiter 15 atque costa subtus elevatis. 

 Panicuhe numerosse, angustse, usque ad 1| ped. longa-, erects, dense 

 ramosae, atque flores puberuhe, ramis pedicellisque gracillimis. Flares 

 feminei pauci, subterminales, circiter 9 lin. diametro ; masculini 

 minores, numerosissimi. Perianthii segment** anguste lanceolata, acuta. 

 Stamina 10, antheris biseriatis, seriebus disjunctis, columna central! 

 verticillatim affixis ; columna supra antheras producta, subulata, 

 puberula, basi glandulis 5 ovoideis cincta. Ovarium pubescens. 

 Fructus ignotus.* — Siphonia spruceana, Benth. in Hook. Kew Journ. 

 Bot. vi. p. 370. 



North Brazil : Santarem, Spruce, 999. 



H. confi 



ill 



one, or both, of these, the only known British Guiana species, are in 

 cultivation, and have been reported on as Ilevea spruceana. The 

 material under observation is insufficient to define these three species 

 satisfactorily ; but the publication of figures and descriptions of what 

 we have may assist cultivators and collectors by indicating what is 

 required to complete the definitions. In the first place it is impossible 

 to refer the seeds represented on plate 2575 (figures 12-15) to their 

 species with absolute certainty. But as only one of them (//. corr/'nsa) 

 appears to be cultivated in the West Indies, it is probable that figures 



* For analysis of flowers see plate 2573, figures 14—17. 



SERIES IV. VOL. VI. PART III. 



M 



