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



few words about the characteristics of the plants in question 

 may be of interest. 



V. rigida, as described by Swartz, is a woody winding 

 shrub having flexuose, densely tomentose branches, rounded, 

 rigidly coriaceous leaves, being 3 — 4,5 cm long by 2,5 — 3 cm 

 wide, somewhat shining above, glandulose and finely pubescent 

 beneath, especially on the veins. The tomentum is often more 

 copious towards the margins of the leaves. The cymes are 

 leaf}', freely flexuose, the heads distant, sometimes two or 

 three in the axils. The involucres are elongated, up to 15 

 mm high, infundibular, long-attenuate at base; the scales 

 are imbricated in numerous series, the outer ones deltoid, 

 carinate, nearly glabrous, erect-appressed, the inner ones 

 elongated, spreading, the dry and open involucres thus re- 

 sembling stars. 



The specimen presented to Montin agrees in leaf -cha- 

 racters perfectly with V. rigida; may be the leaves are a little 

 thinner, and more narrowed, 4 cm long by 2,2 cm wide. It 

 has, further, exactly the same pappus and fruit. However, 

 the involucres are very differently shaped. They are only 

 6 — 7 mm high, broadly obconic, shortly attenuate at base, 

 the scales are shorter and more densely pubescent. Probably 

 this is the normal form of V. rigida, the type specimens be- 

 longing to a form with abnormally elongated involucres. Such 

 formce imbricatissimce occur not infrequently in South American 

 species, for instance, in V. oligactoides Less., V. nitidula Less., 

 and V. squamulosa Hook. Arn. 



Yernpnia fruticosa (L.) Sw. 



Tabula nostra III, fig. 2, 3 (habitus). 



Conyza fruticosa Linné, 1763, p. 1209. 



Vernonia fruticosa Swartz, 1806, p. 1323; De Candolle, 1836, p. 05; 

 Gleason, 1913, p. 315. 



Conyza frutescens Cydoince folio. Plum. Cat. p. 9 ; ed. Burm., tab. 95, 

 fig. 1. 



Ewpatorium frutescens, hederce terrestris folio, /lore purpurascente. Plum. 

 Cat. p. 9(?). 



Frutex vel suffrutex repens (Miguel Fuertes), aut 

 erectus circ. metralis (W. Buch), valde ramosus, ramis saepe 

 elongatis, divaricatis. Caulis lignosus, teres, strictus, adultus 



