350 Floristik u. Systematik der Phanerogamen. — Palaeontologie. 



Esp. iigurees en simili gravure: Rhipsalis angustissima et ramulosa, 

 p. 466. Henri Hua. 



Williams, F. N., ProdromusFloraeBritannicae. Part III. 

 Including a Revision of the British Hieracia. 

 November 1902. p. 75—174 and II— IV. 



In this part of the Prodromus the description of the species of 

 Crepis is brought to an end and the greater part of it is devoted to the 

 genus Hieracium. Comparisons between British and Continental speci- 

 mens have been undertaken, in order to determine the relative values of 

 the specific characters in this genus. — Several pages are devoted to 

 the earliest references to British Hawkweeds. 



75 distinct species of Hieracium are described in Latin and their 

 distribution given. The intermediate forms are considered as hybrid or 

 as possibly corresponding to „phases of the incubat'on of new species 

 in process of formation, and which end by realizing a definite type". 

 Great emphasis is rightly placed on the nature of the hairs and on their 

 distribution; the structure of the alveolar depressions of the receptacle 

 and the type of stem-branching are further important characters. 



The species of Hieracium are included under the two subgenera, 

 Pilosella and Archieracium and are placed in the ten sections, established 

 by Fries, whose principles are not however entirely followed in the 

 distinction of species. 



The following new species are described: 



H. aphyllopodioides n. sp v H. Perthense n. sp. 



The following new forms are described: 



H. pseudopilosella Tenore ß) atrichidium nov. var. ; H. anglicum 

 Fries var. Hartii nov. var. and var. brevifurcatum nov. var., H, Halleri 

 Vill. (f) calenduliflorum n. var v H. chrysanihum Backh. (V) Marshalli n. 

 var. H. Schmidtii Tausch «) normale n. var. and f. lasiophyllum n. f., 

 H jlccculosum ß) Bakeri n. var. and y) cambricum n. var. and <?) insu- 

 lare n. var. and ) alpestre n. var., H. bifidum Kit. ,->) anguinum n. var., 

 H. Pictorum E. F. Lint. ß) Breadalbanense n var., H. silvaticum Gouan 

 a) normale n. var. and ß) micracladium n. var. and y) Stenstroemii n. 

 var. and 0) rivale n. var. and subhirtum n. f. and i) lucidulum n. var. 

 and *) sanguineum n. var v H. ciliatum Almqu. ß) praetenerum n. var. 

 and /) expallidiforma n. var., H. serratifrons Almqu. ß) trianguläre n. 

 var, H. aggregatnm Backh. ß) coracinnm n. var., H. euprepes Hanbury 

 ß) stenophyes n. var v H. ovarium Lindeb. ß) ravusculum n. var. and y) 

 an gustatum n. var., H. vulgatum Fries a) normale n. var., H. laevigatum 

 Willd. subsp. phyllopodioides var. goihicum Zahn f. integrifolia n. f and 

 f. centonata n. f. and var. saxicola n. var, H. laevigatum Willd. subsp. 

 affine var. Friesii n. var. and trichocaulon n. var. and scabrescens n. 

 var. and obatrescens n. var., H. umbellatum Linn. <*) typicum Beck f. 

 normale n. f. and pauciflorum n. f. and litioreum n. \., H. umbellatum 

 Linn. y) linariifolium Wallr. f. vulgare n. f. and filifolium n. f. and 

 Kerrianum n. f., H. corymbosum Fries f. glabra n. f. and flocculosa n. f. 

 and subumbellata n. f. ' F. E. Fritsch. 



Penhallqw, D. P., Notes on Cretaceous and Tertiary 

 Plants of Canada. (Trans. R. Soc. Canada. VIII, IV. 1902. 

 p. 31-91.) 



An account of Cretaceous and Tertiary plants from Van- 

 couver and the Queen Charlotte Islands; Red Deer River, 

 N. VV. T. and the Horse-Fly River, British Columbia. 



The Cretaceous plants add very materially to our previous 

 knowledge of Osmundites skidegatensls through the structure 

 of the stipe and the fertile regments of the frond, so that a 



