324 FLORA VITIENSIS. 
IX. Cenchrus, Linn. Gen. n. 1149; Endl. Gen. n. 783. Spicule 2-flore, flore inferiore ĝ v. 
neutro, superiore g, nunc 1, nunc 2 v. co, intra involucrum oo-fidum, extus setis stipatum, cum 
fructu induratum et deciduum congeste.  Glum:e 2, ineequales, membranacee. Fl. 2: hermaphro- 
dito subconformis, interdum palez superioris et staminum abortu neuter. Fl. 3: Paleæ 2, subco- 
riacez, concave, inferior superiorem amplectens. Stamina 3. Squamule 0. Ovarium sessile. 
Styli 2, elongati, interdum basi subconnati; stigmata plumosa, pilis simplicibus, denticulatis. 
Caryopsis compressiuscula, intra paleas libera.— Gramina ut plurimum annua, culmis sepissime 
ramosis ; foliis planis; spicis terminalibus, simplicibus; spiculis sessilibus; rhachi continua. 
l. C. anomoplexis, Labill. Austr. Cal. p. 14. t. 19; Kunth, Enum. vol. i. p. 167; involucro 
sub-10-partito; laciniis subulatis, pilosis; denticulis ad apicem retrorsis, unica ceteris longiore; 
spiculis solitariis, ternis.— C. australis, var. foliis latioribus, Spreng. Cur. Post. 33.—In dry places, 
Ovalau (Seemann! n. 688). Also colleeted in New Caledonia (M‘Gillivray!), Pitcairn Island 
(Cuming !), and the Hawaiian (Macrae!), Tongan (Sir E. Home !), Samoan (U. S. Expl. Exped. !), 
and Society Islands (Banks and Solander !). 
X. Oplismenus, Palis. Fl. Owar. vol. ii. p. 14; Endl. Gen. n. 778. Spicule 2-flore, flore 
inferiore 3 v. neutro, superiore hermaphrodito. Glume 2, inzequales, concavee v. subcarinatz, seepis- 
sime aristate. Fl. g: Pales 2, inferior aristata. Stamina 3, interdum palea superiore et stamini- 
bus abortivis neuter. Fl. ?: Paleæ 2, subsequales, inferior acuminata, mucronata, superiorem pari- 
nervem amplectens. Squamule 2, collaterales, truncate. Stamina 3. Ovarium sessile. Styli 2, 
terminales, elongati; stigmata plumosa, pilis simplicibus. Caryopsis intra paleas libera.—Gramina 
planifolia ; spiculis spicatis; spicis racemosis paniculatisve ; rhachi continua.—Orthopogon, R. Brown, 
Prodr. 194. Echinochloa, Palis. Agrost. p. 53. t. 11. fig. 2. 
1. O. Burmanni, Palis. Agrost. p. 54; Kunth, Enum. vol. i. p. 139; Humb. Bpl. et Kunth, 
Nov. Gen. vol. i. p. 106; culmis ramosis foliisque pubescentibus, ovatis; spicis subquinis; rhachi 
communi, partialibus glumisque pilosis, aristatis; flore neutro unipaleaceo.— Panicum Burmanni, 
Retz. Obs. 3. p. 10; Willd. Spec. vol. i. p. 339 (excl. syn. Ard.) ; Roxb. Fl. Ind. vol. i. p. 298; 
Trin. Ic. p. 17. t. 193. Panicum hirtellum, Linn. Ameen. Acad. vol. v. p. 391; Burm. Ind. p. 24. 
t. 12. f. 1. Orthopogon Burmanni, R. Brown, Prodr. vol. i. p. 194. Panicum bromoides, Lam. Ill. 
p. 170; ejusd. Encycl. vol. iv. 742 (Rumph. Amb. vol. vi. t. 5. f. 8). Panicum album, Poir. Encycl. 
Suppl. vol. iv. p. 274. O. albus, Roem. et Schult. Syst. vol. ii. p. 890. Echinochloa hirtella, Schult. 
Mant. vol. ii. p. 269. O. Humboldtianus, Nees ab Esenb. in Mart. Bras. vol. ii. p. 264; Presl in 
Rel. Henk. vol. i. p. 822. O. Brasiliensis, Raddi, Agrost. Bras. p. 400. 
Var. 8; foliis purpurascentibus.—Nomen vernac. Vitiense, “Co damudamu” (i.e. the red 
grass).— Viti Levu (Seemann! n. 679). 
Var. y; foliis albo-striatis.—Viti Levu (Seemann! n. 680). 
Both these varieties are cultivated by the natives in the interior of Viti Levu, on account cf their 
pretty foliage, and they are sometimes seen naturalized, if not actually wild in that island. 
2. O. compositus, Roem. et Schulj. Syst. vol. ii. p. 484; Kunth, Enum. vol. i. p. 141; spicu- 
lis oc-floris; floribus geminis, hirsutis; glumis ambabus aristatis; exteriore parum majore; in- 
terioris arista abbreviata; flosculo neutro mucronulato; foliis lanceolatis.— Panicum compositum, 
Linn. Spec. p. 84; Willd. Spec. vol. i. p. 346 (Houtt. t. 96. f. 1); Trin. Ie. p. 16. t. 187. P. un- 
