234 



NOTES ON BRITISH HIERACIA : I 



Caulis ad 55 cm. altus, robustus, striatus, plerumque basi purpurascens, ubique 

 paulum floccosus atque pilosus, sursum glanduloso-pilosus. Folia coriacea, opaca, saturate 

 viridia, plerumque praecipue infra purpurascentia ; radicalia plerumque numerosa; pri- 

 mordialia subrotunda, rotundato-obtusa mucronulata, Integra vel denticulis paucis minutis 

 praedita, basi truncata, breviter petiolata; prima late ovalia usque ad ovata, rotundato- 

 obtusa mucronulata, regulariter denticulata vel saepius dentibus brevibus acutis hori- 

 zontalibus basin versus praedita, dentibus duobus basalibus saepius longioribus atque 

 retrorsis, basi truncata; posteriora ovata usque ad ovato-lanceolata, subacuta acuta vel 

 rarius acuminata, sursum denticulata, basin versus dentata dentibus brevibus horizontali- 

 bus acutis vel mammiformibus, basalibus nonnunquam retrorsis rarius pinnulas in petiolis 

 satis brevibus praebentibus, basi truncata; caulina 1-2, inferiora ovata usque ad ovato- 

 lanceolata, subacuta vel acuta, denticulata vel rarius inferne breviter dentata, basi truncata 

 vel raro cuneata, petiolata, superiora si adsunt bracteiformia ; omnia supra epilosa vel pilis 

 paucis sparsis praedita, infra plus minusve pilosa, supra saepe infra plerumque floccosa, 

 marginibus ciliatis, petiolis pilosis. Inflorescentia paniculato-corymbosa, 3-15-cephala, 

 ramis gracilibus erectis acladium satis breve superantibus ; pedunculi floccosi, pilis glandu- 

 losis brevibus obscuris humerosis necnon aliis simplicibus raris obscuris praediti. Jn- 

 volucra mediocria, basi rotundata. Squamae in gemmis incumbentes, nigrescenti-virides, 

 lineari-lanceolatae, acutae, plus minusve floccosae, subsenescentes, pilis glandulosis 

 obscuris multis necnon aliis simplicibus paucis longis obscuris praeditae. Ligulae apice 

 glabrae. Styli lividi. Alveoli receptaculi marginibus breviter dentatis. Achaenia nigres- 

 centia, 3 mm. longa. 



Stem up to 55cm. high, robust, striate, usually purplish at the base, slightly floccose and 

 pilose throughout, becoming glandular upwards. Leaves coriaceous, dull, dark green, 

 usually suffused with purple beneath and less so above; the radical usually numerous; 

 the primordial subrotund, rounded-obtuse-mucronulate, entire or with a few minute denti- 

 culations, truncate-based, shortly petioled; the earlier broadly oval to ovate, rounded- 

 obtuse-mucronate, uniformly denticulate or more frequently with shallow, horizontal, 

 sharp teeth towards the base, the two basal often longer and retrorse, base truncate; the 

 later ovate to ovate-lanceolate, subacute to acute or occasionally acuminate, denticulate 

 above becoming dentate below, the teeth shallow, horizontal and sharp, or mammiform, the 

 basal sometimes retrorse, in extreme cases occurring as pinnae on the rather short petioles, 

 truncate-based; cauline leaves 1-2, the lower ovate to ovate-lanceolate, subacute to acute, 

 denticulate or occasionally shallowly dentate below, truncate-or rarely cuneate-based, 

 petiolate, the upper when present bractlike ; all epilose or with a few scattered pili above, 

 zb pilose beneath, often floccose above, usually ± floccose beneath, the margins ciliate, 

 petioles pilose. Inflorescence paniculate-corymbose, 3-15-headed, with slender, erect 

 branches exceeding the rather short acladium, the peduncles floccose, with numerous 

 short, dark glands and occasional dark hairs. Heads medium, rounded at the base. 

 PhyUaries incumbent in bud, blackish-green, linear-lanceolate, acute, ± floccose, shghtly 

 senescent, with many dark glands and a few long dark hairs. Ligules glabrous-tipped. 

 Styles livid. Margins of the receptacle pits shortly dentate. Achenes blackish, 3 mm. long. 

 Holotype : Daren Cilau (Craig Cille), Brecon, C. West, 1952, in Herb. Univ. Cantab. 



Hieracium glevcnse (Pugsley) Sell & West sp. nov. 



H. exotericum var. glevense Pugsley (1948), 144. 

 Holotype : Chalford, Gloucester, Riddelsdell, 1920, in Herb. Mus. Brit. 



Hieracium snowdoniense Sell & West sp. nov. 



H. pulcherrimum sensu Pugsley (1948), 147; non (F. J. Hanb.) Roffey (1925). 



