631 



2. HIERACIUM ARDISODON Dahlst. a. sp. 

 (Tab. XI. Fig. 1.) 



Caulis 25 — 32 ctm. altus, gracilis, 0— 1-phyllus, inferne sub- 

 glaber v. parce pilosus, superne sparsim pilosus parce stellatus. — 

 Folia basalia in rosulam 3 — 6-foliara congesta, parva, exteriora ovata 

 — elliptica v. lanceolata, breviter et acute dentata acuta, interiora ±_ 

 lanceolata, longe et irregulariter subulato-dentata longe acuta, in pe- 

 tiolis sæpe rubicundis sat dense et longe pilosa, in marginibus pilis 

 sparsis et floecis parcis (interdum etiam microglandulis rarissimis) 

 obsita, supra dilute viridia, subglabra v. ad marginem versus parce 

 pilosa, subtus canescenti-viridia, sparsim, in nervo dorsali + dense 

 stellato densiuscule pilosa, cæterum rare stellata. — Folium caulinum 

 nullum v. lineare subulato-dentatum — subintegruin, supra medium 

 caulis v. ad medium affixum v. etiam + ovato-lanceolatum — lan- 

 ceolatum, longe et irregulariter subulato-dentatum, longe acutum, 

 infra medium, sæpe ima basi affixum, sessile, subtus + dense stel- 

 latum. — Inflorescentia (vulgo) bicephala acladio 17—40 mm. longo 

 ramoque + superante, erecto-patente v. leviter curvato floecis parcis, 

 pilis albescentibus basi crassa nigra et glandulis gracilibus parcis, 

 microglandulis densiusculis immixtis obtectis. — Involucra sat gra- 

 cilia basi ovata in pedicello 2 — 3-squamoso subdecurrente; squamis 

 exterioribus brevibus linearibus sublaxis + obtusis, cæteris e basi 

 latiore lineari-lanceolatis, in apicem angustum obtusiusculum v. acu- 

 tum sensim et longe protractis, pilis densis mediocriter longis albe- 

 scentibus basi crassa longa nigra et glandulis raris — sparsis ob- 

 tectis, in marginibus præsertim basin versus stria angusta floccosa 

 notatis, intimis + virescenti-marginatis, apice + vinose coloratis. — 

 Calathium c. 35 m. m. diametro + radians, ligulis angustis, stylo 

 badio-virescente. 



NTaago: Sandevaag J. Hartz and C. Ostenfeld . Flower and frnit, 

 August 27, 1897. 



On account of tbe ricbly leafy basal rosette, and the generally 

 leafless stem, which bas often a rudimentarv, sometimes fairly 

 well-developed stem-leaf with sbort petiole (in the latter case often 

 situated near the base of the stem), this form is allied to the Silua- 

 tfcum-type, and it mav most properly be placed under the sub- 

 group Subcæsia of Vulgata. Aniong the different groups of forms 

 belonging to the latter, the present form belongs to the group which 

 comes nearest to Cæsia. It has several features in common with 



