1800 



THUNBERGIA 



THUNIA 



Var. IJevis, Clarke, is glabrous. B.M. 1881. L.B.C. 

 20:1913. Var. vestita, Clarke, is more hairy and the 

 flowers are not fragrant. 



4. er6cta, T. Anders. (Meyenia ertcta, Benth.). 

 Shrub, 2-4 ft. high, with loose spreading branches, half- 

 erect: Ivs. opposite, petiolate, ovate or subrhomboid, 

 smooth, entire or sinuate-toothed: fls. solitary on axil- 

 lary peduncles; calyx cut into 12-14 short teeth, con- 

 cealed by the large bracts; corolla funnelform; tube 

 curved, deep yellow within; limb purple, l%-2 in. 

 across, of 5 subrotund 

 obcordate lobes. Trop. 

 W. Africa. B.M. 5013. 

 F.S. 11:1093. R.H. 1863: 

 251. I.H. 3:99. F. 1855: 

 225. J.H. III. 28:35.- 

 A greenhouse shrub, 

 producing flowers freely 

 at almost any season. 

 Grows in the open in 

 Florida. Not a climber. 

 Var. alba, Hort. Fls. 



2501. Thunbergia erandif lora ( X 



white. Var. cserulea, Hort. Fls. large, intense violet, 

 with orange throat. 



5. chrysops, Hook. Stem climbing, slightly hairy: 

 Ivs. opposite, petiolate, ovate-cordate, angularly toothed : 

 peduncles axillary, solitary, 1-fld.: corolla funnelform 

 orcampanulate; tube yellow, limb, purple, bluish around 

 the throat. Sierra Leone. B.M. 4119. F.S. 1:5. P.M. 

 11:221. F. 1844: 193. -Naturally a climber, but said to 

 become somewhat erect if grown in a coolhouse. 



6. grandifldra, Roxb. Fig. 2501. Stem tall, climbing: 

 Ivs. broadly ovate, angularly cordate and toothed or 

 lobed, somewhat roughened on both sides, petiolate: 

 fls. solitary or in short, stout racemes in the leaf -axils, 

 bright blue, becoming whitish in the throat; corolla- 

 tube bell-shaped; limb 3 in. across, of 5 large, spread- 

 ing rounded lobes. Bengal. B.M. 2366. P.M. 7:221. 

 L.B.C. 4:324. B. 2:76. B.R. 6:495. Gn. 47:1003. I.H. 

 42:32. G.C. III. 9:789.-A very large perennial green- 

 house climber; flowers during the summer or autumn. 

 There is also a white-flowered variety. 



7. laurifdlia, Lindl. (T. Hdrrisii, Hook. T. grandi- 

 flora, Wall.). Stem terete, smooth except the youngest, 



twining: Ivs. long-petiolate, ovate-oblong to oblong- 

 lanceolate, acuminate, rounded at the base, smooth, en- 

 tire or slightly toothed: fls. 3 in. across, pale blue, 

 white or yellow in the throat, borne in axillary whorls 

 or in a raceme in which they are also clustered or 

 whorled; corolla with a wide, oblique trumpet-shaped 

 tube and a large 5-lobed limb. India. B.M. 4985; 4998 

 F.S. 12:1275. Gn. 12, p. 420; 30:563 and p. 293. R.H! 

 1860, p. 342. J.H. III. 28:345. Gng. 3. -295. -Perennial 

 greenhouse climber, flowering profusely in winter. 

 Propagated by cuttings. 



8. Mysorensis, T. Anders. (Hexac6ntris Mysorhisis, 

 Wight). Climbing shrub, with long, slender branches: 

 Ivs. opposite, petiolate, oblong-lanceolate, acuminate, 

 entire or somewhat distantly toothed: racemes long, 

 pendulous: fls. yellow, 2 in. across, the tube enclosed 

 by the spathe-like bracts; limb 4-lobed, the upper lip 

 concave, with reflexed side lobes, lower lip of 3 sub- 

 equal, spreading lobes. India. B.M. 4786. F.S. 8:752. 

 S.M. 2, p. 130. A tall greenhouse climber which flowers, 

 according to treatment, at all seasons. 



9. coccinea, Wall. (Hexactntris coccinea, Nees). A 



very tall climber: stem much branched, 

 4-angled: Ivs. short-petiolate, variously 

 shaped, the lower broadly ovate, with 

 a hastate or cordate angled base, the up- 

 per ovate, cordate, all angularly toothed 

 or the upper entire: fls in terminal or 

 axillary racemes, 1-3 ft. long; bracts 

 large, inflated, as long as the tube; limb 

 scarlet, of 5 reflexed emarginate lobes; 

 throat orange. Autumn and winter. In- 

 dia. B.M. 5124. L B.C. 12:1195. F.S. 

 23:2447. R.H. 1890, p. 197. 



HEINRICH HASSELBRING. 

 THtTNIA (Count Thun-Tetschen, who 

 had an important collection of orchids 

 about the middle of the 19th century). 

 Orchiddcece. A small genus of which at 

 present only 5 species are known. These 

 are tall plants with annual leafy stems 

 terminating in a raceme of showy flow- 

 ers. The genus was formerly united 

 with Phaius, from which it differs by 

 the terminal inflorescence. Sepals and 

 petals similar,spreading; labellum convolute over 

 the column, spurred, ornamented with several 

 crests consisting of lines of fleshy hairs: pollinia 

 8: fls. subtended by large membranous bracts. 



The species of Thunia occur in northern India, 

 Burma, and in the S. Himalaya region ascending 

 to a height of 6,000 ft. The culture of the Thu- 

 nias is very simple. Th y begin growth natur- 

 ally at the end of February or early in March. As 

 soon as new growth is visible the plants should 

 be given new material, consisting of fibrous peat 

 or fern-root and sphagnum mixed with loam and 

 some sand and potsherds for drainage. In their 

 native home the plants are said to be epiphytic, 

 and when treated as terrestrial orchids their na- 

 tive habit may be imitated by setting them well above 

 the pot, which should not be too large. For the first 4-6 

 weeks until the young roots have made good growth, it 

 is necessary to apply water sparingly. Thunias are very 

 rapid-growing orchids and may be liberally supplied 

 with liquid manure until the end of the flowering sea- 

 son, which occurs about the middle of August. Soon 

 after this the leaves fall. The old stems winter in this 

 condition and serve as food reservoirs for the young 

 growth of the next season, but although they remain on 

 the plant two years they form no leaves the second sea- 

 son. During the resting period they should be kept in a 

 rather dry atmosphere and be given only enough water 

 to prevent the stems (pseudobulbs) from shriveling. 

 This is one of the few orchids which can be profitably 

 propagated by cutting the old stems into lengths of 

 about 6 in. and rooting them in sand or sphagnum. 

 When rooted the young plants may be potted in the 

 usual way. A temperature of 60-65 is favorable dur- 

 ing the growing season. 



alba, Reichb. f. (Phdius dlbus, Lindl.). Fig. 2502. 

 Suberect, 2-3 ft., clothed with sheathing, oblong -Ian- 



