TWO NEW SCOTTISH HAWKWEEDS 121 



That is, of course, thoroughly distinct from H. curvatum, but 

 hardly belongs to the Vulgata section. The Rev. E. F. Linton's 

 comment on my No. 3617, in the Watson Botanical Exchange 

 Club Beport, 1911-12, p. 343, rather supports the view now 

 taken : — " There is a look of Nigrescentia about the foliage of 

 these plants, but not in the heads, which are like some of the 

 Silvatica. It may be one of the connecting links between these 

 two groups. I have no name for it." 



H. Isabella is sure to occur in Atholl Forest, v.-c. 89 East 

 Perth ; one of its known stations is close to the county border. 



Hieracium Shoolbredii, n. sp. — Planta 1-5-4 decim. alta. 

 Caulis sulcatus, curvulus, prope basin crinibus albis gracilibus 

 longioribus pubescens aut villosus, ad medium glabrescens, superne 

 parum flocculosus, admixtis hinc inde setis glanduligeris, supra 

 medium fere ramosus. Folia laete gramineo-viridia, in apricis 

 purpurascentia, firma, sed vix carnosa, superne glabra, inferne (ad 

 costam praecipue medianam) pubescentia, longius albo-ciliata ; radi- 

 calia primaria orbicularia vel late ovata, saepius integerrima, obtusa 

 vel mucronata ; reliqua ambitu valde varia, ovata vel oblongo-ovata, 

 in plantis proceris exciso repandove dentata (dentibus plerumque 

 patentibus, prope basin subtruncatam longioribus), apicem versus 

 subintegra, in exemplis minoribus nonnunquam minute sinuata, 

 parce dentata, breviter acutae vel subobtusae ; caulinum unicum, 

 sessile vel breviter petiolatum, lanceolatum, in apicem gracilem 

 protractum, interdum vel bracteiforme. Bractece parvae, subulatae. 

 Pedunculi subrecti, longi longissimive, cano-floccosi, plus minus 

 glandulosi (rami secundarii acladium evidenter superant). Capi- 

 tnla 1-6, pro hac subsectione majuscula, campanulata. Phyllaria 

 exteriora curta, obtusa, linearia vel oblonga ; interiora ante 

 anthesin eximie porrecta, anguste linearia, praelonga, acutissima ; 

 cuncta distincte senescentia, cano-floccosa, setis glanduliferis 

 brevibus, mediocribus, necnon longis numerosis, pilisque longis 

 albis simplicibus vestita. Ligulce citrino-luteae, neque aureae, 

 phyllaria interiora subduplo superantes, apice pilosissimae. Styli 

 nigrescentes. Achenia maturitate nigra. Pappus albus, nitescens. 



Plant 1*5 to 4 decimetres high. Stem furrowed, somewhat 

 curved, pubescent or villous near the base with rather long, 

 slender, white hairs, glabrescent in the middle, slightly flocculose 

 upwards, w T ith occasional glandular bristles, generally branched 

 above the middle. Leaves bright grass-green, purplish in ex- 

 posure, firm, but scarcely fleshy, glabrous above, pubescent beneath 

 (chiefly on the midrib), fringed with rather long hairs ; primary 

 radical ones orbicular or broadly ovate, mostly quite entire, blunt 

 or mucronate ; the rest varying much in outline, ovate to oblong- 

 ovate, scalloped or repand-dentate in strong plants (teeth usually 

 patent, longer at the subtruncate base), subentire towards the tip, 

 in small plants sometimes minutely wavy, sparingly dentate, 

 shortly pointed or bluntish ; stem-leaf one, sessile or shortly 

 stalked, lanceolate, tapering into a slender point, sometimes 

 absent or bract-like. Bracts small, subulate. Peduncles nearly 

 straight, long or very long, cano-floccose (the secondary branches 



