290 USEFUL PLANTS OF ‘GUAM. 
cifie name was given it by Gaudichand in honor of Don Luis de Torres, sarjento- 
mayor at the time of De Freycinet’s visit to the island. 
REFERENCES: 
Gynopogon torresianus (Gaudich.) K. Sch, & Laut. Fl, Deutsch. Schutzgebiete. 
in der Siidsee 504. 1901. 
Alyvia torresiana Gaudich. Bot. Freye. Voy. 451. 1826. 
Habal (Philippines). See Hlephantopus spicatus. 
Habas (Spanish, from faba, Latin). See Phaseolus lunatus inamoenus. 
Haigiie (Guam). A coconut which has sprouted. 
Hala (Hawaii). See Pandanus tectorius. 
Halimedia. See under Algz. 
Halodule uninervis. 
Family Potamogetonaceae. 
LocaL NAMEs.—Chaguan-tasi. 
A plant somewhat resembling eelgrass (Zostera) in miniature, growing in salt 
water. It is dieecious; the flowers, arranged in pairs, have no perianth; the pistil- 
late ones reduced to an ovary with a short style and a long, thread-like stigma; the 
staminate consisting of two anthers growing together aiong their backs, with two 
parallel cells opening outwards by longitudinal slits. 
This genus is closely allied to Cymodocea, but differs in having the male flowers 
at slightly different heights on the flower stem and in having one instead of two 
stigmas. The fruits are roundish-oval and scarcely appressed; leaves narrowly 
linear, with distinct midrib and two marginai veins and without definite finer vena- 
tion, the margins each prolonged into a tooth at the apex, between which the apex 
of the leaf projects. 
REFERENCES: 
Halodule uninervis (Forsk.) Boiss. Fl. Orient. 5: 24, 1884. 
Zostera uninerva Forsk. Fl. Aegypt. Arab. 157, 1775. 
Diplanthera tridentata Steinheil, Annai, Sc. Nat. II. 9: 98. t. 4. f. B. 1838. 
Halom (Philippines). See Amaranthus oleraceus. 
Halophila ovata. Same as Halophila ovalis. 
Halophila ovalis. 
Family Vallisneriaceae. 
A plant growing in the sea, often near low-water mark or deeper, and at the mouths 
of streams. Stems creeping and rooting under water, having at each node a pair of 
ovai or oblong-elliptical, thin, feather-veined leaves with entire margins and long 
petioles; at the base of the petioles 2 broad, thin, colorless, hyaline scales, within 
which are the ovate sessile involucres or double spathes inclosing the flowers; male 
flowers on pedicels emerging from the involucre; perianth of 3 segments; anthers 3, 
sessile, alternating with the segments, erect, 2-celled, the cells opening outward; 
pollen confervoid; female flowers without perianth, sessile within the involucre; 
ovary single, tapering into a filiform style with a short stigma, either entire or 
divided into 3 to 5 filiform segments; ovules several, erect, attached to the sides of 
the cavity; fruit membranous, opening irregularly; seeds nearly globular, with a 
thin testa. 
This species was first collected in Guam by Gaudichaud. It is often washed up on 
the beach with algae.@ 
REFERENCES: 
Halophila ovalis (R. Br.) Hook. Fl. Tasm. 2: 45. 1860. 
Caulinia ovalis R. Br. Prod. 339. 1810. 
Halophila ovata Gaudich. Bot. Freye. Voy. 430. t. 40. f. 7. 1826. 
« Bot. Freycinet Exp. 430, 1826. 
