402 BURMA, ITS PEOPLE AND PRODLX'TIQXS. 



* Aclienes shortly or long-heahed. 

 Lactuca, Linna'us. 

 Achenes more or less compressed, ribbed. Bristles of pappus persistent or 

 deciduous. Florets yellow or blue. 



* L. scAEioLA, L. Cultivated in Prome and the drier districts. 

 Stout annual. Leaves runcinate and spinulose-tootlied, lialf-stem-claspinp; with 



a sagittate base. Panicle large, furnished with auricled stem-clasping bracts. 

 Flower-heads nearly i inch long. 



var. a genuina. Panicle pyramidal, var. ji sufii-a, L. Panicle fastigiate. 

 L. (IxEEis) poLYCEPHALA, Cass. Tapau, near Bhamo. 



Ixeris fontinaUs, D.C. 

 Slender annual. Leaves linear, entire or nmcinately lobcd, sessile with a sagit- 

 tate base. Panicle lax and corymb-like, poor, the bracts subulate, small. Flower- 

 heads rather broad, 3-3J lines long. 



** Aclicnes not beaJwd. 



PfiENANTHES, LhindUS. 



Achenes almost terete or somewhat compressed, bluntish 3-5-comercd, not or 

 scarcely ribbed. Bristles of pappus more or less persistent. Florets purple to white, 

 never yellow. 



Leaves simple. 



P. ALATA, H. f. et Th. Martaban at 5000 to 6000 feet. 



Leaves sagittate, the petiole long and broadly-leafy-winged and sagittately or 

 auricular-dilated at the base. Panicle lax, the flower-heads nearly I inch long, 

 nodding, on slender-bracted peduncles. 



P. (SoNCHTs) HoTH^, Clarke. Khakyen Hills. 



Leaves, at least the cauline ones, sessile with a sagittate base. Flower-hcuds 

 long and slenderly peduncled, forming a narrow terminal panicle. 



The base oftho involucral bracts becomes sliglitly thickened and indurated in 

 fruit, but the inflorescence and the narrow few and apparently purplc-tlowered 

 flower-heads are those of a Prenanthcs, not of Sonehus (Kurz). 



Soxcnrs, Linnaus. 



Achenes more or less compressed, ribbed. Bristles of pnppMS soft, white at base, 

 united into a ring and deciduous with it. Involucral bracts often incrassate-dilated 

 in fruit. Florets yellow. 



* Involucral bracts glabrous or puherulous, but not glandular-pilose or hispid. 



S. ASPER, Vill. Burma {fde Clarke). 



S. fallax, Waller. 

 Achenes much compressed, 3-ribbed on both sides, the ribs perfectly or almost 

 perfectly smooth. Leaves usually runcinate-pinnatifid. 

 S. OLERACEOS, L. Ava. 



<S'. ciliatus, Lamk. 

 S. Wallichiamis, D.C. 

 Achenes compressed, the ribs marked with transverse asperities, and muricate. 

 Leaves runcinate-pinnatifid or simple. 



** Involucral bracts and peduncles glandular-hispid or glandular-pilose. 

 S. ARVEXsis, L. "Waste spots round cultivation, about 



<S'. orixensis, Eoxb. Bhamo and the Martaban Hills. 



S. Wightianus, D.C. 

 Achenes hardly compressed, the ribs thick and transversely muricate. Leaves 

 more or less slightly runcinate, the upper ones simple. 



