PuaTe 2637. 
ZSCHOKKEA UTILIS, Hemsl. 
APOCYNACEX, 
tilis, Hemsl. ; Tabernemontana — Arn. in Edinb. N. Phil. 
Z. u 
Journ viii. (1830) p. 318 ; ad Z. monos sperm d folioram 
S primariis paucioribus differt. 
floriferis uit on glaberrimis, internodiis us. Lola a petio- 
lata, coriacea, a agri oblonga vel oblongo- aa usque ad 
pall. lon ce , 14-2 3 poll. lata, obtuse piling basi on vel 
S pra medium circum anthera aullo infla atus, extus phir intus 
infra stamina hirsutus ; limbi lo bi brevis, erecti, rotundati. Stamina 
medio tubi affixa, filam entis brevissimis, antheris omnino inclusis 
Ovarium glabrum, 2-loculare, loculis ait aadatice stylo stamina vix 
wequante. Fructus baccatus, ovoideus, 8-10 lin. longus, 1-spermus (an 
semper ?). Semen ovoideum vel ellipsoideum, testa brunnea, mem- 
branacea, albumine corneo ; embryo axilis, amplus, Wie ‘apices: 
bus compressis tenuibus cordatis ese radicula bre 
ITISH GUIANA: Up er Demerara river, Jenman, 4275; near 
Rockstone, Essequibo river, Jenman, 7491. 
This is one of the trees called Hya-hya by the natives of Guiana ; 
and it is the cow-tree of the English colonists. r. G. 8. Jenman, to 
whom Kew is indebted for the specimens described and figured here, 
states in a letter accompanying the specimens, that a bottle of milk 
was taken from the same ee and allowed to dry in the bottle, when 
it was found to contain a large proportion of rubber of good quality. 
G. A. Walker Arnott’s botanical deseription (Hdin. NV. Phil. Journ. 
viii., 1830, pp. 315-318), is preceded by a detailed account of the 
Hya- ya or milk-tree of Demerara, by James Smith, from which the 
following paragraphs have been extracted : 
“© T was then in company with a Mr. Couchman, the superintendent 
of a wood- cutting fen et aan in the immediate vicinity. We had 
