486 LXXVII. C0NV0LVULACEJ2 [Lettsomia 



4. LETTSOMIA, Roxb.; Fl. Brit, Ind. iv. 191. 



Differs from Avgyreia mainly by a 2-celled ovary. Species 32, tropical 

 Africa and Asia.' 



A. Stamens esserted, corolla less than 1 in. long, limb lobed. 



1. L. aggregata, Roxb. ; Wight Ic. t. 1359. Deccan, common in hedges. Burma, 

 Upper and Lower. Ceylon dry region, very common. A large woody climber, stems 

 fluted, structure see Talbot 249. Branches long, as well as underside of 1. and inflor- 

 escence densely white tomentose, 1. ovate from a cordate base, blade 3-5, pet. 1-2 in. 

 long. Fl. heads bracteate, arranged in long terminal panicles, peduncles grooved, 

 corolla J in. long, very hairy outside. 2. L. mysorensis, Clarke, Mysore. Similar to 1, 

 fl. in pedunculate axillary corymbs, bracts deciduous. 3. L. laxiflora, Pram in Journ. 

 As. Soc. Beng. 63. 92. Upper Burma. Fl. in lax axillary and terminal corymbs or 

 panicles. 4. L. bella, Clarke. Nepal. Chutia Nagpur, common. G-anjam. Yunnan. 

 L. cordate, 4 in. dianu, pet. 2-3 in. long. Fl. in axillary heads, peduncles terete 1-2 in. 

 long. 



B. Stamens included, corolla 1 in. long and longer. 



(a) Bracts persistent, broad, 1 in. long or less. 



5. L. strigosa, Roxb. Sikkini Terai. Assam, valleys of the Khasi hills. Plains of 

 Bengal. Chittagong. Andamans. Burma, Upper and Lower. Branchlets, 1. and 

 inflorescence strigose with long soft hairs, 1. ovate with a cordate or rounded base, 

 blade 3-4, pet. 2-4 in. long, fl. in dense axillary bracteate heads, peduncles 2-5 in., 

 bracts elliptic-oblong 1 in. long. Nearly allied and perhaps not specifically distinct 

 are : 6. L. peguensis, Clarke, and 7. L. barbigera, Clarke. 



(b) Bracts persistent, lanceolate or linear, longer than 1 in. 



8. L. atropurpurea, Clarke. Convolvulus atropurpureus, Wall. PI. As. Bar. t. 43. 

 Nepal. Sikkim Terai. L. more or less hairy, ovate-lanceolate, blade 4-6, pet. 1-2 in. 

 Fl. in bracteate heads, peduncles J in., corolla dark purple, sometimes white, 1J in. 

 long. 9. L. barbata, Clarke. Convolvulus barbattis, Wall. PI. As. Bar. t. 155. 

 Pegu. Tenasserim. Branchlets, petioles, underside of 1. and inflorescence with long 

 fulvous hairs, 1. lanceolate, gradually narrowed from a broad base, blade 5-S, pet. A in. 

 Heads few -fid., nearly sessile, bracts linear 1 in. long, forming an involucre converging 

 over the flowers, corolla pale yellow and rose-coloured. 10. L. Mastersii, Prain in Journ. 

 As. Soc. Beng. 63, 98. Garo and Naga hills. Chin hills. L. hairy beneath, ovate, blade 

 4-6, pet. 1-6 in. long, bracts linear - , hairy, 1-lA'in. long. 11. L. longifolia, Coll. et 

 Hemsley in Journ. Linn. Soc. xxviH. 95. Shan hills Terai. Slightly strigose, 1. linear- 

 lanceolate, blade 6-S, pet. J— § in., bracts lanceolate. 



(c) Bracts deciduous, sepals densely clothed with long stiff hairs. 



12. L. setosa, Roxb. : Wight Ic. t. 1360. Mount Abu.. Central Provinces. Oudh 

 forests. Chutia Nagpur. Centr. Prov. Western Peninsula. Burma, Upper and 

 Lower. L. more or less strigose, cordate, blade 3-5, pet. 1-3 in. long. Fl. rose-coloured, 

 in large corymbs, peduncles strigose, 2-8 in. long, bracts falling when the fl. open. 

 Corolla 1^-2 in. long, densely strigose outside. 13. L. hirsutissima, Clarke. Upper 

 Burma. L. ovate or ovate-lanceolate, on both sides softly strigose, corymbs axillarj 1 ", 

 peduncles 1-2 in. long. 14. p L. Thomsoni, Clarke. Siwalik hills and Outer Himalaya, 

 from Kasauli to Sikkim. L. sparsely strigose, fl. rose-purple in few-fid. heads, 

 peduncles 1-3 in. long, bracts spathulate, sometimes persistent. 15. L. ,confusa, Prain 

 in Journ. As. Soc Beng. 63, 96. Burma, Upper and Lower. L. sparingly hirsute to 

 nearly glabrous on both surfaces. 



(d) Bracts deciduous, sepals glabrous or nearly so. 



16. L. elliptica, Wight. Peninsula, chiefly on the West side. Ceylon. L. thin, 

 elliptic, sparsely strigose, blade 3-5, pet. slender A-2 in. long, sec. n. oblique, 8-10 pair. 

 Fl. in loose corymbs, peduncles 2-5 in., corolla 1J in. long, nearly glabrous outside. 



17. L. sikMmensis, Clarke. Sikkim 3,000 ft. Assam. Khasi and Naga hills. Cachar. 

 Upper Burma. Similar to 16 and possibly not specifically distinct. Fl. and fr. larger. 



18. L. pallida, Prain, Avgyreia pallida, Choisy. Middle Irawadi valley and foot of 

 Shan hills. L. thin, nearly glabrous, almost orbicular, blade-3-4 in. diam., pet. 1-3 in. 

 long. Corymbs lax, slightly grey-hairy, corolla 1 in. long. 



5. PORANA, Linn. ; Fl. Brit. Ind. iv. 221. 



Twining shrubs or herbs, leaves petiolate, ovate, usually entire. Fl. purple, 

 white or steel blue, in racemes or large panicles, bracts persistent. Sepals all 



