24 ARKIV FÖR BOTANIK. BAND 13. N:0 15. 



Teriioiiia Tuerckheimii Urb. 



Tabula nostra I, fig. 10 (pars inflorescentise) 

 Vernonia Tuerckheimii Ukbax, 1912, p. 421 ; Gleasok, 1913, p. 327. 



Pappi setse interiores persistentes, numero 65, rigidulae, 

 crassiusculse, paullulo complanatae, stramineo-purpurascen- 

 tes, quam exteriores insequales, parum conspicuse circ. 8-plo 

 longiores. Corolla 7 mm longa, tubo amplo, glabro long. 

 -'3 corollae, limbi laciniis apice subtus papillosis, cetermn 

 glabris. Antherse 2,5 — 2,8 mm longse, ligula longa, Ys loi^g- 

 antherse, auriculis brevissime apiculatis. 



Hab. in Hispaniola: Constanza, in declivibus pineti 

 aridis, alt. 1250 m, mense Febr, 1910, Türckheim n. 2959 

 (D, KU, M). 



A verj^ characteristic species, easily recognized by tlie 

 purple-tinged involucres and pappus. The description given 

 by Urban is excellent. 



Subsect. Graciles. 



Suffrutices vel jrutices Jmmiles. Folia memhranacea, forma 

 et pubescentia varia. Injlorescentia cymoso-scorpioidea, cymis 

 elongatis, scepissime cauliformibus, calathidiis axillaribus, ses- 

 silibus, scepe geminatis; bracteis foliaceis, calathidiis longioribus. 

 Calathidia parva. Involucrum campanulatum, squamis scepe longe 

 vel longissime mucronatis. Receptaculum planum, subnudum. 

 Pappi setce interiores persistentes, tenues, albidce, exteriores 

 distinctce. Corolla vidgo 6 mm longa, limbi laciniis dorso laxe 

 pilosis. Antherce circ. 2 mm longm. Achcenia tenuiter appresso- 

 -pubescentia. 



A very natural subsection closety related to the Arbo- 

 rescentes, and chiefly distinguished by the pubescence of the 

 clefts of corolla, further b}^ the characteristics of the inflor- 

 escence and the involucres. The range of the subsection 

 extends from Columbia to eastern Brazil. Well-known spe- 

 cies belonging here are V. gracilis H. B. ,K., V. Cotoneaster 

 (W.) Less., V. Salzmannii DC. (not Baker in PI. Bras.), 

 V. araripensis Gardn., F. acutangula Gardn., V. tricephala 



