FLORA VITIENSIS. 489 
vissima; anther oblongo-lineares, basi 2-lobz. Stylus filiformis, basi disco epigyno elevato arcte 
cinctus; stigmata 2 v. 3, linearia seu filiformia. Ovarium 2—3-loculare. Ovula in loculis solitaria, e 
basi erecta, anatropa. Drupa apice nuda, 2-pyrena, raro 3-pyrena ; pyrenis cartilagineis facie planis. 
Semen cavitati conforme. Embryo in basi albuminis æquabilis cornei parvus; cotyledonibus late 
ovalibus planis radicula conica brevioribus et latioribus.— Frutices crassiramei, macrophylli; sti- 
pulis intrafoliaceis subvaginatis; floribus capitato-congestis, capitulis bracteis latissimis membra- 
naceis inciso-lobatis involucratis ad apicem caulis cymoso-glomeratis.—Humachia, DC. Prodr. 
vol. iv. p. 479? 
This genus, whieh will probably prove identical with Eumachia, DC., is confined to the New Hebrides, 
Viti, and Samoa, and well distinguished from Psychotria or Cephaélis by the remarkably large, funnel- _ 
shaped calyx which is fully developed before the tube of the corolla emerges from the tube of the calyx. 
Ewmachia carnea, DC. Prodr. vol. iv. p. 479 (Petesia carnea, Forst. Prodr. n. 51, et Icon. (ined.) t. 22; 
Gertn. Fruct. vol. iii. p. 66. t. 192, non P. Browne et Linn. nec Hook. et Arn.) from the Tongan Islands 
(Forster! Nelson! U. S. Expl. Exped.!), has recently been described as Chasalia Amicorum by A. Gray in 
Proceed. Amer. Acad. vol. iv. A careful revision of Calycosia, Eumachia, and Chasalia will be necessary 
before any definite opinion is arrived at about the possible identity or difference of these three genera. 
1. C. petiolata, A. Gray, l. c.; foliis obovatis seu obovato-lanceolatis in petiolum attenuatis ; 
calyce breviter 5-lobo, lobis oblongis; pyrenis dorso haud costatis.— Viti, locality not specified (U. S, 
Expl. Exped.). 
2. C. pubiflora, A. Gray, 1. c. ; foliis membranaceis glabris oblongo-lanceolatis acuminatis in 
petiolum attenuatis (4-6 poll. longis) ; cyma laxa trichotoma calycisque tubo viscoso-pubescentibus, 
limbo crateriformi extus puberulo; drupa turbinata, pyrenis chartaceis intus excavatis.—Namosi, 
Viti Levu (Milne !), Taviuni (Seemann! n. 214). 
Flowers white.: 
3. C. Milnei, A. Gray, l.c.; glaberrima; foliis oblongis sublanceolatisve basi attenuatis longi- 
uscule petiolatis punctulatis (3-6 poll. longis); cyma diffusa, repetito-trichotoma ; pedicellis graci- 
libus.—Nomen vernac. Vitiense, * Kau wai” (i. e. Frutex aquaticus).—O valau, in woods (Seemann ! 
n. 213; Storck! n. 892). Also collected in Aneitum, New Hebrides (Milne !). 
XVI. Ixora, Linn. Gen. n. 131; Endl. Gen. n. 3161.. Calyx tubo ovato, limbo brevi 4-5- 
dentato. Corolla hypocraterimorpha, tubo gracili cylindrico, fauce nuda v. barbata, limbi 4—5-par- 
titi laciniis tubo brevioribus, acutis v. obtusis, zestivatione convolutis, sub anthesi patentibus. Sta- 
mina 4-5, corolle fauci inserta, subexserta; filamenta brevissima v. subnulla; antherz oblonge, 
erectæ. Ovarium 2-loculare, disco epigyno carnoso. Ovula in loculis solitaria, medio dissepimento 
peltatim inserta, amphitropa. Stylus simplex, vix exsertus; stigma 2-fidum, laciniis patentibus 
v. revolutis. Bacca globosa, 2-pyrena, pyrenis chartaceis, dorso convexo lzvibus, facie concavis, 1- 
spermis. Semina cavitati conformia, umbilico ventrali. Embryo intra albumen cartilagineum dor- 
salis, homotrope incurvus ; cotyledonibus foliaceis, radicula elongata, infera.— Frutices v. arbusculze ; 
foliis oppositis, petiolatis, stipulis interpetiolaribus utrinque solitariis, e basi lata acuminatis y. in 
aristam setaceam desinentibus, corymbis terminalibus, sepius trichotomis, floribus coccineis roseis 
rariusve albidis, sæpe fragrantibus.— Pavette sp. auct. d 
Besides the species indigenous to Viti, we have in tropical Polynesia Irora amplifolia, Gray, S. Samo- 
ensis, both from the Samoan Islands, and T. fragrans, Gray ; (Cephaélis fragrans, Hook. et Arn. Bot. Beech. 
t. 131), from Tonga (Nelson !), and Elizabeth Island (Lay and Collie!), all three belonging. to A. Gray’s 
section Phylleilema, which is distinguished by a pair of bracteant leaves, forming a diphyllous involucre 
to a cluster of three or more sessile flowers. It is not improbable that S. Samoensis is identical with 
Ixora triflora, Seem., (Pavetta triflora, DC. Prodr. vol. iv. p. 492. Coffea triflora, Forst. Prodr. n. 95. 
Chioccoa triflora, Spreng. Syst. vol. i. p. 756,) which was found in the Society Islands (Forster !). 
