92 TRANSACTIONS OF THE [Sess. lxxxvi 



Formania mekongensis, W. W. Sm. et J. Small. Gen. et 

 sp. no\'. 



"West China: — Bei Ma Shan, Mekong- Yangtze divide, 

 Yunnan, in open situations amongst scrub. Lat. 28° 20' N. 

 Alt. 10,000 ft. Aromatic shrub of 2-3 feet. Flowers pale 

 yellow. August 1914." G. Forrest. No. 13,183. 



This interesting plant is one of the many new types 

 discovered in Yunnan by Mr. G. Forrest. The timbrillate 

 receptacle is of interest in connection with the occasional 

 development of quite distinct receptacular paleae in the 

 allied genus, Chrysduthenium. In the latter, part of the 

 edo;e or " timbrilla " sometimes grows out to form a bract- 

 like structure, in spite of the fact that the absence of 

 receptacular scales is the one diagnostic character of the 

 G/irysantJiemidhiae. The development of the five long 

 paleae of the pappus, very distinctive in Formania, might 

 be considered to have occurred in the same way, from 

 some of tiie numerous short scales which occur on the top 

 of the achenes in some species of CJtrijsa7ithe7niom. The 

 presence of well-developed basal appendages to the anthers 

 would even then remain as a floral character separating 

 Formania from Ghrysanthemuni and Cancrina in which 

 such appendages are absent, and also from Allardia where 

 the auricles are connate, not free as in Formania. 



The generic name which has been attached to the new 

 genus is in honour of the Rev. Adam Forman, O.B.E., 

 one of the chief orgtinisers in Scotland of the supply of 

 Spkaijtutm in the form of surgical dressings during the 

 years 1915-1919. 



EXPLANATION OF PLATE IL 



Formania 'iiiekoiuiensU, W. \V. Sin. and .1. Snrill. 



A. Portion of llowering braucli (nut. .size). 



jj. Fiinbrillate receptacle with a few involucral !)racts attached. 



C Portion of liguhite floret showing l)ifid styh'. 



\). Dissection of style, s., and slanieiis, st., of disc floret, showing 



truncate style and parts of stamens as follows: — a. ap., apical 



ap])endage ; f. .s., pollen sac ; b. ap., basal a[)iiendage ; a. ar., 



article antherifere ; /., filament. 

 E. Achene of disc floret showing ciliate paleaceous awna or scales of 



pappus. 



