752 CONVOLVULACEAE 



lA. Plants green, with chlorophyll, nonparasitic; stamens without scales at base; leaves well developed. 



2A. Ovary 2-lobed; styles 2; small creeping herbs; corolla broadly campanulate; flowers solitary in axils, small 1. Dichondra 



2B. Ovary unlobed; style 1, sometimes very short. 



3A. Scandent herbs, sometimes slightly woody at base; leaves orbicular to ovate-cordate; flowers 2 cm. or more long; style elongate; 

 fruit a capsule. 



4A. Bracts small, not covering the calyx; ovary 2- to 4-locular 2. Ipomoea 



4B. Bracts large, covering the calyx; ovary 1-locular 3. Calystegia 



3B. Scandent evergreen shrubs; leaves elliptic to oblong; flowers 10 mm. long; style nearly absent; fruit a 1 -seeded berry. . . 4. Erycibe 

 IB. Plants not green, without chlorophyll, parasitic; stamens with small scales at base; leaves reduced to scales 5. Cuscuta 



1. DICHONDRA Forst. Aoigoke Zoku 



Delicate creeping herbs; leaves cordate-orbicular or reniform, small; flowers axillary, solitary, small; calyx-segments nearly 

 equal, often spathulate; corolla broadly campanulate, deeply 5-lobed, the lobes induplicate in bud; filaments filiform, the anthers 

 small; ovary 2-lobed, the lobes usually 2-locular and 2-ovuled; styles 2, filiform, the stigma capitate; capsules membranous, usu- 

 ally densely pubescent, 2-parted, erect, each lobe 1 (-2) -seeded; seeds subglobose, smooth; cotyledons oblong-linear. Few 



species in Centr. and S. America, one widely distributed in tropical and subtropical regions. 



1. Dichondra repens Forst. Sibthorpia evolvulacea L. shorter than the petioles, yellow, about 3 mm. across; calyx- 



f.; Dichondra micrantha Urb.; Dicrondra evolvulacea (L. segments or sepals obovate-oblong; corolla-lobes oblong, 



f.) Britt. Aoigoke. Thinly yellowish pubescent or nearly slightly longer than the calyx; lobes of capsules globose, about 



glabrous; stems very slender, creeping, matted; leaves loosely as long as the calyx, loosely long-hairy. Apr.-Aug. Around 



arranged, reniform- to orbicular-cordate, 5-10 mm. long, 8-20 dwellings and along roadsides in lowlands; Honshu (warmer 



mm. wide, rounded to retuse, deeply cordate, the petioles slen- parts of w. distr.), Shikoku, Kyushu. s. Korea, Ryukyus, 



der, 1-4 cm. long; flowers sessile or on short delicate peduncles Formosa, and the Tropics generally. 



2. IPOMOEA L. Satsuma-imo Zoku 



Herbs, rarely shrubs, usually twining; leaves alternate, entire or palmately lobed; inflorescence cymose, often capitate, some- 

 times in terminal panicles, the bracts persistent or caducous, the peduncles axillary, 1- to many-flowered; flowers purple, red, or 

 white, rarely yellow; calyx-segments sometimes unequal; corolla infundibuliform or campanulate, the limb 5-plicate in bud, 

 entire, rarely deeply 5-lobed; stamens not exserted, the filaments filiform or dilated below, sometimes hairy; ovary 2- or 4-locular 

 and 4-ovuled, or 3-locular and 6-ovuled; style filiform, the stigma globose or 2-lobed; capsules globose; seeds glabrous or pilose; 

 cotyledons broad, often bifid. About 400 species, in warmer areas of the world. 



lA. Calyx-segments elliptic to oblong, obtuse, mucronate; ovary 2-Iocular, 4-ovuled; leaves orbicular, obovate-orbicular to elliptic, retuse 



to bilobed, glabrous 1 . ?• pes-caprae 



IB. Calyx-segments lanceolate, gradually narrowed to tip; ovary 3-locular, 6-ovuled; leaves cordate, abruptly acuminate, scattered-pilose. 



2. /. indica 



1. Ipomoea pes-caprae (L.) Sweet. Convolvulus pes- 2. Ipomoea indica (Burm.) Merr. Convolvulus indicus 



caprae L.; /. biloba Forsk.; /. pes-caprae subsp. brasiliensis (L.) Burm.; /. congesta R. Br.; Pharbitts congesta (R. Br.) Hara; 



Oostst.; C. brasiliensis L. Gumbai-hirugao. Glabrous P. insularis Choisy; I. insularis (Choisy) Steud.; P. indica 



creeping perennial, the branches terete; leaves rather thick, Hagiwara, excl. syn. No-asagao. More or less pilose 



long-petiolate, orbicular, obovate-orbicular to elliptic, some- scandent annual; stems slender, branched; leaves membranous, 



times orbicular-cuneate, 3-8 cm. long, 4-10 cm. wide, retuse to cordate, 5-10 cm. long, 4-8 cm. wide, entire, abruptly acumi- 



shallowly 2-lobed, cuneate to truncate-rounded at base, the mid- nate, long-petiolate; peduncles 2-5 cm. long, shorter than 



rib rather strong, the lateral nerves nearly parallel, ascending; the petioles, 1- to 3-flowered, the pedicels shorter than the 



peduncles longer than the petioles; inflorescence cymose, 1-2 calyx, the bracts linear-lanceolate; calyx-segments lanceolate, 



(-6)-flowered, the pedicels 1-4 cm. long, flattened in fruit, the gradually narrowed to tip, green, about 2 cm. long; corolla 



bracts small, caducous; calyx-segments membranous, broadly blue-purple, 7-8 cm. long, 6-7 cm. across; ovary 3-locular and 



elliptic to oblong, 6-8 mm. long, rounded to very obtuse, 6-ovuled; style about half as long as the corolla. June-Dec. 



mucronate; corolla rose-purple, infundibuliform, 5-6 cm. Thickets in lowlands and hills; Honshu (Izu Isls., Kii), Shi- 



across; ovary 2-locular, 4-ovuled; capsules about 2 cm. across, koku, Kyushu. se. Asia and Australia. 



depressed-globose; seeds semiglobose, brown-villous, about 7 



mm. across. Aug.-Nov. Sandy places along seashores; 



Shikoku, Kyushu. Pantropic. 



3. CALYSTEGIA R. Br. Hirugao Zoku 



Creeping or scandent herbs, glabrous or nearly so; leaves alternate, entire or palmately lobed; peduncles axillary, 1-flowered; 

 bracts 2, large, persistent, covering the calyx; flowers rather large, rose, white, or purplish; calyx-segments mostly equal or the 

 inner ones shorter; corolla campanulate or infundibuliform, the limb 5-plicate, entire or 5-angled, sometimes slightly 5-lobed; 

 stamens not exserted, the disc annular; ovary 1-locular or partially 2-locular, 4-ovuled; style filiform, the stigmas 2, flat, ovate 

 or oblong; capsules globose; seeds glabrous; cotyledons broad, often 2-lobed. Few species, in tropical and temperate regions. 



