RUBUS DUMNONIENSIS. 



S. teliferum Ralfs. E. 



S. Brebissonii Archer. E. 



S. punctulatum Breb. M. 



S. alternans Breb. E. P. 



S. dispar Breb. E. 



S. dilatatum Breb. E. 



S. tricorne Breb. E. — /3. Ralfs. 



E. 

 S. margaritaceum Ebr. E. 

 S. inflexum Breb. E. W. 

 S. polymorphum Breb. E. 

 S. gracile Balfs. M. P. 

 S. paradoxum Meyen. E. 

 S. tetracerum Kg. E. W. 

 Pediastrum Tetras Ebr. E 

 P. Heptactis Ehr. E. H. 

 P. Boryanum Turp. E. H. 

 P. Xapoleonis Turp. E. H. 

 Staurogenia rectangular is Br. E. 

 Ccelastrum sphcericumNsig. E. H. 

 C. cubicum Nag. E. 

 Sorastrum spinulosum Nag. E. 

 Characium longipes Babenh. E. 

 Dictyospharium Ehrenbergianum 



Nag. E. 

 Nephrocytium Nagellii Grim. E. 

 N. Agardhianum Nag. E. 

 Ophiocytium parvulum Perty . E . 



H. 



Hormospora mutabilis Breb. E. 

 Pleurococcus vulgaris Men. E. 

 Chlorococcum gigas Kg. E. 

 Glceocystis ampla Kg. E. 

 Schizochlamys gelatinosa Br. E. 

 Botryococcus Braunii Kg. E. 

 Palmodactylon simplex Nag. E. 

 Raphidium acicidare Br. E. 

 R.faicatum Corda. E. H. 

 Pi. biplex Reinscb. E. 

 Scenedesmus obtusus Mey. E. 

 S. acutus Mey. E. H. 

 8. antennatus Breb. E. 

 S. quadricauda Turp. E. H. 

 H. Selenastrum Bibraianum Reinscb. 



E. 

 Polyedrium tetraedricum Nag. E. 



H. 

 Glochiococcus hirtus Reiusch. E. 

 Tetrapedia Reinschiana Archer. W. 

 Spirulina tenuissima Kg. E. 

 Chroococcus cohcerens Nag. E. 

 C. turgidus Nag. E. 

 Glceocapsa quatemata Breb. E. 

 Merismopedia glauca Nag. E. 

 Microcystis marginata Kirch. E. 

 CielosphcBrium Kutzingianum Nag. 



E. 

 Gomphosphceria aponina Kg. E. 



RUBUS DUMNONIENSIS. 

 By Prof. C. C. Babington, F.R.S. 



Rubus Dumnoniensis, u. sp. — Stem more or less arcuate, 

 angular, furrowed ; prickles long, slender, patent from a short com- 

 pressed base on the angles ; leaves 5-nate-palmate ; leaflets cori- 

 aceous, flat, not wavy at the edge, finely and doubly serrate, with a 

 close coat of grey-white felt and hairy beneath, all stalked ; terminal 

 leaflet obovate, subcuspidate, rounded and nearly entire at the base ; 

 panicle nearly cylindrical, leafy below, with short, few-flowered, sub- 

 corymbose, ascending branches, its rachis and peduncles hairy, 

 scarcely felted, with many short sunken setae, its prickles patent, 

 many, slender ; sepals triangular-ovate-cuspidate, hairy, felted, not 

 aciculate, refiexed ; stamens exceeding the styles ; petals pure white, 

 large, oval. 



R. Dumnoniensis Bab. MS. 



R. rotundatus ? Focke ! in Jouru. Bot. 1890, 129. 



Stem often dark purple, the prickles yellowish towards their 

 point. Leaflets broadest above their middle. Lower branches of 



