H. DAHL5TEDT, Z. KENNTNIS DER HIERACIUM-FLORA ISLANDS. 17 



Hieracium Stroemfeltii n. sp. 



Tafel I, Fig. 5. 



Catilis 10 — 20 ctm. altus, simplex — 2-eephalus. ram o 

 brevi 1-cephalo, ex axillo fol. caul, inflmi ssepe evoluto, flexuo- 

 sus, 1 — 2-forius, pilis sat densis, longis, iuferne albidis, superne 

 fuscescentibus basi crassa nigra, sub involucris + dense, inferne 

 + sparsim floccosus, glandulis superne et in pedicellis sat den- 

 sis, longis, basin versus magis magisque sparsis— raris (ima 

 basi fere nullis) obtectus. Folia bascdia 4 — 7, mediocriter 

 petiolata, exteriora rotundata — ovalia, + obtusa, intermedia 

 ovalia — anguste ovata, obtusa — obtusiuscula, omnia basi 

 ovata — subtruncata, imequaliter et late dentata (exteriora 

 ssepe dentibus humilibus angulata, interiora dentibus latiori- 

 bus et longioribus patentibus prsedita), intima ovata — lan- 

 eeolata, interdum subrhoniboidea basi decurrente, dentibus 

 patentibus v. retroversis. latis, imequilongis preedita, acutius- 

 cula, omnia pnecipue in marginibus et in petiolis dense pilosa, 

 subtus in costa subfloccosa; folia caulina 1 — 2, infimum + 

 petiolatum, lanceolatum, subintegrum v. dentibus binis in utra- 

 que latere infra medium prseditum, acutum, subtus parce 

 stellatum, undique dense pilosum, summum parvum, lineare; 

 folia omnia in margine parce stellata et glandulis minutis 

 preadita. Invölucra sat magna, 12 — 13 mm. longa, 7 — 9 mm. 

 lata, basi rotundata, solitaria v. duo, alterum ex axillo folioli 

 summi, bracteiformis evolutum, pedicello acladium usque ad 

 5 cm. longum hand v. vix superante; squamis latiusculis, 

 + lanceolatis, exterioribus obtusiusculis intermediis + acutis 

 et intimis sat longe acutis v. subulatis, pilis longis caneseenti- 

 bus, basi brevi nigra crassiuscula dense vestitis et glandulis 

 minutis, parcis, parum conspieuis obsitis. Calathidium 35 — 

 40 mm. diametro, ligulis sat latis, extus dense pilosis, denti- 

 bus longis, glabris v. fere epilosis, stylo obscure virescente, 

 sicco fere nigro. 



Ausbreitung: Nordisl., Yadlaheidi (H. F. G. Strömfelt); 

 Myvatn in einer »Gjå» (Strömt'.); Begisardalur (St. Stefan son); 

 Tjarnadalur (St. St.); Hofsfjall (St. St.) 



Durch die breiten, sehr langgestielten, mit unregelmässi- 

 gen, groben und abstehenden Zähnen versehenen Grundblät- 

 ter, durch das untere, fast ganzrandige Stengelblatt und di 



Arkiv för botanik. Band .V. N;o 10. a 



