230 USEFUL PLANTS OF GUAM. 



and is easily separated from the pulp. The pulp is reddish and of a peculiar odor 

 which is shared by the rind and leaf. The leaves are small and usually pointed. 



Several trees are now growing in the garden of Don Jose Herrero in San Ramon, 

 near the southern edge of Agana. The fruit, though not equal to the best tangerines 

 of our markets, has a good flavor. 

 References: 



Citrus nobilis Lour. Fl. Cochinch. 2: 466. 1790. 

 Citrus vulgaris Seeman. See Citrus aurantium. 



Cladium gaudichaudii. Twig-rush. 



Family Cyperaceae. 

 A leafy sedge with compressed two-edged culms; leaves (equitant) straddling, in 

 two vertical ranks, linear, sword-shaped, rigid; peduncles bearing many spikelets, 

 growing from the axils of the upper leaves in threes or more; panicle much branched; 

 spikelets solitary, one-flowered; glumes few, disposed nearly in two vertical ranks, 

 keeled, boat-shaped; hypogynous bristles or scales wanting; stamens 3, exserted; 

 style 3-cleft, conically thickened at the base, silky-hirsute; achene sessile, bony,, 

 obovate-elliptical, obscurely 3-angled, beaked with the persistent silky-hirsute base 

 of the style. 



This species was described by Gaudichaud from a specimen collected by him in 

 in the Marianne Islands in 1819. He says that it closely resembles in habit u Vin- 

 centia angustifolia," of Hawaii, and the structure of the spike scarcely differs from 

 that of Gahnia. 

 References: 



Cladium gaudichaudii. 



Baumea mariscoides Gaudich. Bot. Freyc. Voy. 417. 1826. 

 Cladium mariscoides Villar in Blanco, Fl. Philipp. ed. 3. 4: Nov. App. 309. 

 1880. 

 The genus Baumea has been merged by Hooker into that of Cladium on account 

 of the affinities of certain Australian species with that genus. Hillebrand, writing 

 on the Hawaiian species, thinks that Baumea and Vincentia might well be joined, 

 but that both ought to stand apart from Cladium. The treatment here followed, 

 however, is that of Hooker and other recent authors, but the transfer of Baumea 

 mariscoides to Cladium necessitates a change in the specific name in order not to con- 

 flict with the name of another plant, Cladium mariscoides (Muhl.) Torr. 



Cladium mariscoides F. Villar. Same as Cladium gaudichaudii. 



Claoxylon marianum. Claoxylon. 



Family Euphorbiaceae. 



Local names. — Panao (Guam). 

 A handsome tree having loose axillary racemes of small dioecious flowers, followed 

 by 3-coccous capsules. Branches rather stout, terete, smooth, densely leafy; leaves 

 alternate, petioles firm, glabrous, 2 to 3 times shorter than the blade (3 to 5.5 cm.); 

 blade membranous, opaque, olivaceous, scaberrulous, when young sparingly ap- 

 pressed-pu bescent and dark violet, oblong-elliptical, shortly cuspidate-acuminate or 

 somewhat obtuse, with the base acute or subobtuse (8 to 16 cm. long, 4J to 9 cm. 

 broad), margin distantly and obtusely denticulate, secondary nerves 7 to 10 on each 

 side of the midrib, transverse veins broadly reticulate, the smaller ones not conspicu- 

 ous; inflorescence sparingly appressed-pubescent, of a waxy texture, bluish -green; 

 racemes of moderate length, with fascicles growing from axils of bracts; male flowers 

 with about 25 stamens, filaments distinct, anthers rather broad, 2-celled, erect, adnate 

 to the top of the filament; pistillode absent; perianth divisions normally 3, valvate 

 in bud; female flowers with perianth divisions petal -like; ovary 3-celled, styles 3, 

 free at the base, not bifid, lacerately stigmatose. 



