V 



243 DE NOVA P.YGEI SPECIE. 



brous petioles, and uniformly brown fruit, never eniarginate at base. 

 The leaves of even the most luxuriant specimens of //. vulgaris never 

 have more than 9 nerves. 



The geographical range of the two species is very dift'erent. II. 

 vulgaris, notwithstanding its name, is a very local plant, not found out 

 of Europe. 1 have seen it from Scotland (Gillies!), England (Leigh- 

 ton !, Sowerby!, E. Eorster !), Wales (Newbould!), Jersey (Newbould !), 

 France (Billot ! n. 3853), Germany (Seemann !), Switzerland (Herb. 

 Mus. Brit.), and Tuscany (Savi ! Cesati !). Babington enumerates it 

 in his Icelandic list. II. verticillala, on the contrary, has a wide range, 

 being spread over three continents. I have seen specimens from the 

 Cape of Good Hope (Wallich !, Eoberts !, Lind !), Virginia, Carolina, 

 Massachusetts, and California (Mitchell !, Beyrich !, Green !, Cha- 

 misso!), Jamaica (Swartz!), Gibbs' Land and New South Wales (R. 

 Brown!, Fi Mueller!). TheUnited States Exploring Expedition collected 

 it also in the Sandwich Islands. 



The conclusions which my materials and study of Hydrocolyles 

 allow me to draw are — 



1. That H. pleiaidha and //. vulgaris are identical. 



3. That Europe has only one species of Hgdrocotyle, viz. H. vul- 

 garis. 



3. That II. vulgaris is specifically different from H. verticillata, 

 Thunb. {iuterrtipia, Miihl.), and does not coexist in the same geogra- 

 phical area with II. verticillala. 



4. That H. vulgaris is limited to the European continent ; and 



5. That H. verticillata is spread over the three continents of Ame- 

 rica, Africa, and Australasia. 



DE NOVA PYGEI SPECIE. 



AucTORE Henr. F. Hance, Ph.D. 



// 

 Pygeum oxycurjmm, sp. n. ; arbor 70-80-pedalis, ramis brunneo- 



cinereis ruguloso-striatis, ramulis compressiusculis, stipulis glabris 



linearibus caducis, foliis petiolo ^^-f-pollicari utrinque paulo infra 



lirabi insertionem glandula conspicua depressa (altera vel utraque 



