254 USEFUL PLANTS OF GUAM. 
the sterile ones elliptical or spathulate, blunt, the fertile ones longer and narrower; 
texture coriaceous; upper surface naked, lower thinly coated with whitish tomentum 
in the sterile but more densely in the fertile part beneath; veins hidden; sori small, 
bright reddish brown, immersed, occupying the whole of the contracted upper part 
of the frond. 
This species is spread throughout the islands of the Pacific Ocean. It is also found 
in India, Ceylon, and the Mascaren Isles. 
REFERENCES: 
Cyclophorus adnascens (Sw.) Desv. Berl. Mag. v. 300 (ex Luerssen). 
Polypodium adnascens Sw. Syn. Fil. 25, 222. tab. 2. f. 2. 1806. 
Cymbidium triste Willd. Same as Luisia teretifolia, 
Cynodon dactylon Pers. Same as Caprivla dactylon. 
Cyperaceae. SEDGES. 
The following members of this family are known from Guam: Carex densiflora, 
Carex fuirenoides, Cladium gaudichaudii, Cyperus difformis, Cyperus pennatus, Cyperus 
rotundus, Eleocharis capitata, Eleocharis plantaginoidea, Fimbristylis complanata, Fim- 
bristylis diphylla, Fimbristylis globulosa, Fimbristylis miliacea, Fimbristylis puberula, 
Fimbristylis spathacea, Fuirena umbellata, Kyllinga monocephala, Kyllinga monocephala 
subtriceps, Rynchospora corymbosa, 
Cyperus difformis. 
Family Cyperaceae. 
A glabrous annual sedge often growing in rice fields; stem 10 to 50 em. high, acutely 
3-angled at the top; leaves usually somewhat shorter than the stem; spikes arranged 
in umbelled heads, the umbel either simple, compound, or reduced to one head, the 
rays up to 5 cm. long, sometimes longer; bracts 5 to 25 em. long, lowest often sub- 
erect (umbel lateral); spikes globose, 8 to 12 mm. in diameter; spikelets very small, 
linear-oblong, most densely crowded; glumes close-packed, concave, very obtuse, 
straw-colored, sides more or less red; stamens 1, rarely 2; anther small, oblong; nut 
subsessile, subequally trigonous, pale brown; style shorter than the nut; stigmas 3, 
linear, short. 
REFERENCES: 
Cyperus difformis L, Cent. Pl. 2: 6.1756; Amoen. Acad. 4: 302. 1759. 
Cyperus hexastachyos. Same as Cyperus rotundus. 
Cyperus pennatus. 
A sedge collected in Guam by Gaudichaud, with compound umbels of cylin- 
drical sessile spikes. Stems 60 to 90 em. high; leaves longer than stem. 
REFERENCES: 
Cyperus pennatus Lam. Ill. 1: 144. 1791. 
Mariscus albescens Gaudich. Bot. Freye. Voy. 415. 1826. 
Cyperus rotundus. NutTGRass, 
Loca, NAMEs.—Chaguan Humitag (Guam); Mootha, Mutha (India); Hama- 
sage (Japan). 
A sedge growing in sandy places, with aromatic tuberous rootstock, having the 
odor and taste of camphor. Very common in Guam, often growing in the yards of 
Agafia with grasses and near the shore. It is a most troublesome weed in garden 
patches. In Japan its roots are collected in the winter, dried, and used for medi- 
cine. 
REFERENCES: 
Cyperus rotundus L. Sp. Pl. 1: 45.1753. 
Cypress vine. See Quamoclit quamoclit. 
Cytisus cajan. Same as Cajan cajan. 
