BOTANICAL NOTES AND NEWS 251 



Study of British Roses. A paper on the 'Collection and 

 Identification of British Roses,' by Rev. A. Ley and Major A. H. 

 Wolley-Dod, in the "Journal of Botany," July 1909, will be found 

 helpful to students of the British flora, and should enable its readers 

 to secure good material for the recognition of the forms. To 

 appreciate the assistance it affords, the paper requires to be care- 

 fully studied ; but the authors briefly enumerate at its close the 

 relative importance of the several features helpful in determining the 

 various types of roses. These features are : 



Of primary importance. Of secondary importance. 



Habit. Colour of stem and foliage. 



Stems .... Direction. 



Prickles . . . (Size and shape). Number. 



Leaflets . . . Serration and clothing. Number (size and shape). 



Petioles . . . ... Clothing. 



Stipules and bracts . ... Form and clothing. 



Peduncles . . . Length and clothing. Number. 



Sepals . . . Direction and duration. Pinnation and clothing. 



Styles . . . Cohesion and hairiness. 



Disc .... (Shape). 



Fruit . . . Time of ripening, shape Colour. 



and size. 



Characters inclosed in brackets might be placed under either primary or 

 secondary, according to the group or sub-section to which the species under con- 

 sideration belongs. 



British Species of Taraxacum. In the " Monographic der 

 Gattung Taraxacum," published in 1907, by Dr. H. v. Handel- 

 Mazzetti, the forms seen by him from the British Islands are named 

 as below : 



1. T. paludosum, Lightf. [T. officinale, var. palustre (Sm.) of 

 Babington's " Manual "]. Europe (except almost all Russia) 

 as far north as Upsala, also Asia from Thibet and North 

 China to Trans-Baikal Siberia and in Persia. 



2. Intermediates between T. pahidosum and T. vulgare [T. 

 officinale, var. ndiim (Jord.), of Bab. "Man."]. Europe and 

 Western Asia to N. India and Turkestan. " Anglia et 

 Scotia ; e locis usque ad ins. Shetland dispersis." 



3. T. vulgare, Lam. \T. officinale, var. a of Bab. " Man."]. 

 Europe and Asia, except in arctic zone : introduced by 

 man into all parts of the world. " Anglia et Scotia, e locis 

 dispersis." 



4. T. lavigatum (Wild.), DC. \T. officinale, var. erythrospernmm, 

 of Bab. " Man."]. Warmer places in Europe (except in 

 north), in Western Asia, and in Atlantic region of N. Africa ; 

 introduced by man elsewhere, e.g. into N. America, " Edin- 

 burgh, Ayr," and numerous localities in England. 



