The Convolvulaceae of Malaysia, III by S.J. van Ooststroom (Rijksherbarium, Leiden) (Issued March 1st, 1940). The genus Ipomoea. subdivided Hallier ²) the Convolvulaceae into two groups, viz. the Psiloconiae, with smooth pollen grains, and the Echinoconiae with spinose Psiloconiae in have been ones. The genera of the occurring Malaysia dealt with in parts I and II of the present paper, with exception of which shall be treated in the genus Erycibe, a special monograph. of Echinoconiae contains viz. 1. The group two tribes, Ipomoeeae in The and 2. Argyreieae, both represented Malaysia. genus Ipomoea belongs to the Ipomoeeae. The materials examined belong with a few exceptions to the herbaria of Buitenzorg (B), Leiden (L), Pasoeroean (Pa), Utrecht (U) and Wageningen (W). It seemed better not to ask for the loan of foreign collections broken of the 1939. during the war, out in the course year XVI. IPOMOEA L. L., Spec. PI. ed. 1 (1753) p. 159; BLUME, Bydr. (1825) p. 708; CHOKY in Mem. Soc. Geneve VI id. in Mem. Soc. Phys. (1833) p. 444; Geneve VIII id. in Prodr. IX Phys. (1838) p. 52; DC., (1845) p. 348; PI. Ned. Ind. PI. IV MIQ., II (1857) p. 601; BENTH., Austr. (1869) p. 412; BENTH. & HOOK., Gen. Plant. II (1876) p. 870; CLARKE in PI. Brit. Ind. IV Hist. PI. X IIOOK., (1883) p. 196; BAILLON, (1891) Pfl. p. 321; PETER in ENGL. & PRANTL, Nat. fam. IV, 3a (1891) p. 28; II in Blumea ') Part I in Blumea III, 1 (1938) p. 62—94; part III, 2 (1939) p. 267—371. a ) Versuch einer natiirlichen Gliedcrung der Convolvulaceen auf morplio- logisclier und anatomischer Grundlage in ENCLT.R'S Botanischo Jahrbiichor XVI 453—591. (1893) p. 482 BLUMEA VOL. 111, No. 3, 1940 HALL. F. in ENGL., Bot. Jahrb. XVI (1893) p. 583; id. in ENGL., Bot. Handb. JALIRB. XVIII (1893) p. 123; TRIMEN, Fl. Ceyl. ILL (1895) p. 210; BOERL., Handl. Fl. Ned. Ind. II (1899) p. 503, 510; BAKER & RENDLR in THJS.-DYER, Fl. Trop. Afr. IV, 2 (1905) p. 128; PRAIN in Journ. As. Soc. Bengal LXXIV (1906) p. 310; KOORDERS, Exk. fl. Java 111 GAGNEP. & COURCH. in Fl. Indo-Chine IV (1912) p. 116; LEG, (1915) Fl. Penins. II Enum. p. 229; RIDLEY, Malay (1923) p. 459; MERRILL, Fl. PI. ILL Onkruidfl. Jav. Pliilipp. (1923) p. 364; BACKER, Suikerrietgr. —- Meth. 453 (1931) p. 521 Quamoclit MOENCH, (1794) p. (Quamoelit); CHOISY in Mem. Soc. Geneve VI id. in Prodi'. Phys. (1833) p. 433; DC., Fl. Ned. Ind. II PETER in IX (1845) p. 335; MIQ., (1857) p. 593; ENGL. & Nat. Pfl. fam. 3a HALL. in PRANTL, IV, (1891) p. 27; f. ENGL.,. Bot. Jahrb. XVI id. in Bot. Jahrb. XVIII (1893) p. 584; ENGL., (1893) Handl. Fl. Ned. Ind. II p. 154; BOERL., (1899) p. 505, 513; BAKER & Fl. Afr. 2 RENDLE in TIIIS.-DYER, Trop. IV, (1905) p. 127; PRAIN in Soc. LXXIV HOUSE in Bull. Journ. As. Bengal (1906) p. 318; Torrey Exk. fl. Bot. Club XXXVI (1909) p. 595; KOORDERS, Java III (1912) Enum. Fl. PI. Ill p. 122; MERRILL, Pliilipp. (1923) p. 370; BACKER, Onkruidfl. 529 — CIIOISY Jav. Suikerrietgr. (1931) p. Batatas in Menu id. Soc. Phys. Geneve VI (1833) p. 434; in Mem. Soc. Phys. Geneve VIII (1838) p. 45; id., in DC., Prodr. IX (1845) p. 337; MIQ., Fl. Ned. Ind. II (1857) p. 598 — Pharbitis CHOISY in Mem. Soc. Phys. Geneve VI (1833) p. 438; id. in DC., Prodr. IX (1845) p. 341; MIQ., Fl. Ned. Ind. II (1857) p. 594; PETER in ENGL. & PRANTL, Nat. Pfl. fam. 3a 31 — CHOISY in Mem. Soc. Geneve IV, (1891) p. Calonyction Phys. VI id. in Prodr. IX FL (1833) p. 441; DC., (1845) p. 345; MIQ., Ned. Ind. II PETER in ENGL. & Nat. Pfl. fam. (1857) p. 596; PRANTL, 3a HALL. f. in Bot. Jahrb. XVI IV, (1891) p. 26; ENGL., (1893) p. 583; id. in ENGL., Bot. Jahrb. XVIII (1893) p. 153; id. in Bull. Herb. Boiss. V Handl. Fl. Ned. Ind. II (1897) p. 1021; BOERL., (1899) p. 504, 512; BAKER & RENDLE in Fl. Afr. 2 TIIIS.-DYER, Trop. IV, (1905) p. 117; PRAIN in Journ. As. Soc. LXXIV Bengal (1906) p. 319; KOORDERS, Fl. Exk. fl. Java III (1912) p. 122; MERRILL, Enum. Pliilipp. PL 111 369 — CIIOISY in Soe. Geneve VI (1923) p. Exogonium Mem. Phys. id. Soc. id. (1833) p. 443; in Mem. Phys. Geneve VIII (1838) p. 49; in DC., Prodr. IX (1845) p. 346; BAILLON, Hist. PL X (1891) p. 322; Nat. PETER in ENGL. & PRANTL, Pfl. fam. IV, 3a (1891) p. 27. Herbs or shrubs, usually twining, sometimes prostrate or floating or erect. Leaves very various in form and size, entire, lobed or di- vided. Inflorescences 1—few the axillary, cymose, or many-flowered, S. J. VAN OOSTOTBOOM: The Cunvolvulaccac of Malaysia, 111 483 bracts flowers medium-sized cymes rarely paniculate; various; small, or various in large. Sepals 5,. herbaceous or subcoriaceous, very shape, often ovate to lanceolate, linear or elliptic, obtuse or acute to acuminate or aristate, unequal or equal, glabrous or hairy, persistent, often more or less enlarged in fruit. Corolla regular or rarely slightly zygo- salver- morphic, usually funnel-shaped or campanulate, more rarely shaped, the limb plicate, shallowly or rarely deeply 5-lobed, midpetaline inserted areas well defined by 2 distinct nerves. Stamens 5, generally near the base of the corolla-tube, included or rarely exserted; filaments the less filiform or dilated at base, often more or unequal; anthers ovate, oblong or linear; pollen globular, spinulose. Disk annular. Ovary usually 2 or sometimes 4-celled, 4-ovuled, rarely 3-celled, 6-ovuled; style filiform, included, rarely exserted; stigma capitate, entire or often 2—3-globular. Capsule globose or ovoid, mostly 4 or rarely 6-valved, or splitting irregularly or indchiscent. Seeds glabrous or hairy, 4(—6) or less. Distribution: Widely spread in the tropical and subtemperate regions of both hemispheres. Remarks. HAULIER in his paper entitled Convolvulaceae afri- in ENGLER'S Botanische Jalirbiicher XVIII eanae, published (1893) of the into 6 sections. p. 81—160, gives a subdivision genus Ipomoea These sections have been characterized by HAULIER as follows: HALL,, 1. 123. Sect. 1. Calycanthemum (KLOTSCH) f., c. p. Small, mostly annual or rarely perennial, pilose herbs, with prostrate, erect or rarely twining stems; leaves cordate, subhastate, oblong, elliptic, or rarely pinnately lobed; flowers small or moderate; sepals ovate or lan- white ceolate, acute, the base often broadened or auriculate; corolla or pale pink, mostly small, rarely larger; seeds mostly shortly tomentose. Sect. Plants 2. Dasychaetia HALL, f., 1. c. p. 130. mostly large, perennial, prostrate or erect, strigose or woolly; leaves petiolate or ses- flowers sile, ovate; large; sepals lanceolate or setaceous, long pilose or woolly; corolla large, pale pink. Pharbitis 1. 131 1 Annual or Sect. 3. (CHOISY) HALL, f., c. p. ). rarely perennial high-twining, rarely small herbs, mostly hispid or leaves cordate three-lobed lanate, very rarely glabrous; distinctly or or palmately 5—7-lobed, rarely oblong or lanceolate, hispid or villose or green above and white-lanate beneatb, very rarely glabrous; flowers ") The sectional name Pharbitis was already used by Grisebacii, PI. Brit. West Indian Isl. 47.8. (1864) p. 484 BLUMEA VOL. 111, No. 3, 1940 mostly showy; sepals lanceolate or linear, hirsute, very rarely glabrous; corolla mostly reddish, funnel-shaped or rarely tubular, subentire; seeds glabrous or shortly arachnoid. This section includes: a. Cephalantha e CHOISY emend. HAH,, f., 1. c. p. 131. Flowers in dense capitate, pedunculate inflorescences; outer bracts mostly large, involucrant. b. Chorisanthae HALL, 1. 135. Flowers f., c. p. axillary, solitary or in lax leaves dichasia, rarely aggregate; distinctly cordate or three-lobed or palmately 5-lobed, never oblong or lanceolate. Sect. 4. Batatas HALL, I.e. Leaves (CHOISY) f., p. 138'). petiolatc, cordate three-lobed distinctly or pandurate or or palmately 5-lobed, glabrous, or appressed-hairy; flowers mostly small, axillary, in long- umbellate flower -or short-pedunculate cymes, rarely solitary; buds co- nical, mostl.y very acute; sepals oblong, subcoriaceous, mostly lanceolate, with ciliate further often very acute margins, glabrous, attenuate from stiff base into herbaceous recurved obtuse a pale a green, acumen, rarely or entirely glabrous; corolla funnel-shaped, entire, pink or white, 1.5—• 5 seeds cm long, glabrous; ovary mostly hirsute; glabrous. Sect. 5. HALL, 1. 139. Plants Leiocalyx f., c. p. mostly entirely glabrous, rarely with hairy stems, more rarely with hairy leaves, most with rarely hairy sepals; leaves mostly petiolate, their form very various; flowers pedunculate, axillary, solitary or in subumbellate dichasia; sepals very various, mostly oblong or lanceolate, often verrucose or cristate on the hack; corolla mostly bright red or purple, rarely white, glabrous or farinose very rarely or pubescent without, mostly subentire; seeds mostly entirely glabrous, rarely velutinous or with bearded outer edges. Sect. 6. Eriospermum HALL, 1. c. 149. Perennial f., p. plants, very variable in habit, pubescence, leaves and flowers; flower buds rarely often acute, mostly obtuse, very globular; sepals mostly obtuse, often flat orbicular, convex, rarely or acute; seeds with long-bearded edges, further glabrous or rarely the whole surface villosc. and treated HALLIER 1. Calonyction Quamoclit are by c. as separate genera. In 1922 in the Mededeelingen van 's Rijks Herbarium, Leiden, No. 19 and HALLIER mentions and 46, p. 20, Calonyction Quamoclit as subsections of the section Leiocalyx: Ipomoea sect. Leiocalyx subsect. ') Tho sectional name Batatas was already used by GMSHBACII, FL. Brit. West Indian 1st (1864) p. 468. S. J. va\ Oostotboom: Tlh Convolvulaceae 111 of Malaysia, 485 I.e. and Calonyction (CHOISY) HALL.!'., p.