FLORA VITIENSIS. 163 
character of Sarcolobus, R. Br., but they are not apice lateraliter pellucidz,' as Miquel has it. Dr. See- 
mann takes this for a new genus, and, indeed, as the genera are arranged by Decaisne, it does not accord 
throughout with either Bidaria, Gongronema, or Gymnema proper, while the erect habit is also peculiar. 
a Me the two former genera be restored to Gymnema, the present plant could not well be excluded."— 
. Gray. 
EXPLANATION OF Pirate XXXI., representing Gymnema stenophyllum, A. Gray.—1, an entire flower ; 
2, the same, without the corolla ; 3, styles; 4, staminal apparatus ; 5, pollen masses ; 6, follicles; 7, seed,— 
all, with the exception of 6, magnified. 
III. Hoya, R. Brown in Trans. Wern. Soc. vol. i. p. 26; Decaisne in DC. Prod. vol. viii. p. 
634. Calyx brevis, 5-phyllus. Corolla rotata, plus minusve alte 5-fida, laciniis planis v. reflexis, 
sstivatione valvata. Corona staminea 5-phylla, foliolis depressis patentibus v. plus minusve gy- - 
nostegio verticaliter adnatis carnosis angulo interiore in dentem anthere incumbentem producto. 
Gynostegium breve. Antherze membrana terminate. Masse pollinis basi affixe, oblonge, com- 
pressz, conniventes, sepius margine pellucide. Stigma muticum, cum papilla media obtusa v. sub- 
apiculatum. Folliculi leves v. appendiculis instructi, subpolypteri. Semina comosa.—Frutices v. 
suffrutices volubiles, scandentes aut decumbentes ; foliis carnosis v. coriaceis v. membranaceis; flori- 
bus umbellatis ; umbellis extra-axillaribus sæpius co-floris.—Sperlingia, Vahl in Act. Soc. Hafn. vol. 
vi. p. 112. 
A very distinet-looking Hoya has recently been discovered in the Samoan group, viz. H. Samoénsis 
(sp. nov.), Seem.; scandens, glabra; foliis ovato-ellipticis acuminatis 5-tuplinerviis, nervis utrinque promi- 
nulis; coroll# lobis extus glabris, intus puberulis. Nomen vernaculum Samoense, “ O-le-Fua-dele-la.’’— 
Samoan Islands (Powell! in Herb. Hook.). 
1. H. bicarinata, A. Gray in Proceed. Amer. Acad. vol. v.; scandens ; foliis glabellis subcar- 
nosis planis obscure penninerviis ovalibus obovatis seu ovatis brevissime abrupteque acuminatis basi 
rotundatis subcordatisve, lamina supra petiolum hirtellum glandulosa; pedunculo pedicellis haud 
longiori ; sepalis lineari-oblongis ; corollz albz extus glabre intus puberulz lobis ovatis acutis planis ; 
coron: staminez foliolis incrassatis, disco obovato concavo angulo interno longiuscule acuminato, 
marginibus haud revolutis, dorso eximie. bicarinato.—Asclepias volubilis, Forst. Prodr. n. 128, et 
Icon. (ined.) t. 75 et 76, excl. syn.—Viti Levu and Ovalau (Seemann! n. 319). Also collected in 
Tana (Forster !), and the Samoan Islands (U. S. Expl. Exped.). 
What I distributed under the name H. pilosa (n. 321) is probably only a young state of this species, 
having the leaves more hairy below. 
2. H. diptera, (sp. nov.) Seem. in Bonplandia, vol. ix. p. 257; scandens, glabra; ramulis 4- 
angulatis; foliis ovato-ellipticis acuminatis basi ovatis carnosis penninerviis ; pedunculis compressis 
subalatis, petiolo longioribus; floribus flavis.— Viti Levu and Taviuni, on trees (Seemann! n. 320). 
Also collected by U. S. Expl. Exped. 
Perhaps a specimen, without flower, collected in the Isle of Pines (M‘Gillivray), which has leaves twice 
as large as those of my specimens, may belong to this species, of which there are also imperfect specimens 
only. 
Orpo LXII. : LOGANIACEJZE, 
All the genera of Loganiacee of tropical Polynesia are represented in Viti, with the exception of La- 
bordia. That genus, which according to recent researches, ranks next to Geniostoma, 1s confined to the 
Hawaiian Islands. Three species of it are known, viz. 1, L. tinifolia, A. Gray, 2, L. fagreoides, Gaud., 
and 3, L. sessilis, A. Gray. 
I. Geniostoma, Forst. Gen. p. 24.t. 12. Calyx parvus, acute 5-fidus. Corolla subinfundibu_ 
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