NEW SPECIES, NEW COMBINATIONS, AND NEW RECORDS IN CONVOLVULACEAE FOR THE FLORA OF THAILAND
Now that more specimens are available, the degree of intergradation between these slight differences is complete and we find it impossible to maintain both species. It should be noted that the oldest name for this species is I. bracteosa Gagnep., but this epithet is preoccupied in Argyreia by A. bracteosa (C.B.Clarke) Raizada. We then have to choose between Kerr’s two epithets, which were published simultaneously. In Thai herbaria, the name A. breviscapa has been more widely used than A. calcicola, so we are choosing to maintain the former. Evidently the corolla color varies, because a number of specimen labels
report corollas that are purplish or pinkish as well as white.
B. Argyreia hylophila (Kerr) Staples & Traiperm, comb. nov.— Ipomoea hylophila Kerr, Bull. Misc. Inform. Kew 1941: 17. 1941. Type. Thailand. Nakhon Sawan: Raheng, Ban Pa Yang, 16 Nov. 1920, Kerr 4579 (isotypes A!, BK!, E!, K!, TCD!).
When Kerr named this species he wrote “When mature fruit is known, it is possible that this species, probably also I. nana, may have to be transferred to Lettsomia. Both species have rather the facies of that genus.” Finally a specimen with mature fruits has been matched with the type and proven Kerr’s surmise correct. There is a considerable distance between the two localities where A. hylophila has been collected and it is to be hoped that some populations of this endemic species may yet survive in this now heavily developed area.
Thailand.— EASTERN: Ubon Ratchathani [Khong Chiam district, ca km 51.5 along Rte. 2134 in mixed dipterocarp scrub forest on sandy soil, 29 Nov. 1985, Staples & Wongprasert 364 (A)].
C. Argyreia melvillei (S. Moore) Staples, comb. nov.— Lettsomia melvillei S. Moore, J. Bot. 43: 144. 1905. Type. Myanmar. Shan State: Pyinsamben, Melville 36 (holotype BM!).— Argyreia maymyo (W.W.Sm.) Raizada, Indian Forester 93: 754. 1967.— Lettsomia maymyo W.W.Sm., Rec. Bot. Surv. India 6: 38. 1914, synon. nov. Type. Myanmar. Maymyo plateau, Lace 4275 (holotype CAL, n.v., isotype K!).— Argyreia sp. 3 of Traiperm, Tax. Study Argyreia Thailand p. 90, fig. 29, pl. 10 h, i. 2002.
The oldest name for this widespread species had yet to be taken up in Argyreia and that combination is made here. The change of epithet is regrettable.
D. Argyreia popahensis (Collett & Hemsl.) Staples, comb. nov.— Ipomoea popahensis Collett & Hemsl., J. Linn. Soc., Bot. 28: 95. 1890. Type. Myanmar: “upper Burma” sine loco, Oct. 1888, Collett 905 (holotype, K!, isotype BM!).— Argyreia stenophylla (Kerr) Staples & Traiperm, Thai For. Bull. (Botany) 33: 42. 2005.— Lettsomia stenophylla Kerr, Bull. Misc. Inform. Kew 1941: 16. 1941, synon. nov. Type. Thailand. Chiang Mai: Mae Taeng, 30 Oct. 1922, Kerr 6490 (isotypes BK!, BM!, K!).— Argyreia lineariloba C.Y.Wu, Yunnan Trop. Subtrop. Flor. Res. Rep. 1: 134. pl. 38, fig. 1. 1965, synon. nov. Type. China.Yunnan: Cho Mo Hsian, Chu Hsiung, 16 Sept. 1938, M.K. Li 0007 (holotype KUN!).
The Thai specimens have slightly broader sepals in flower and in fruit but are otherwise identical with the Burmese plants that formed the basis of I. popahensis. I can