88 PENTANDRIA TETRAGYNIA. Linum. 



Bristles of each nectary numerous. E. B. 82. Gra- 

 men Parnassi. G. E. 480. 



Spongy hogs, commons. Peat bogs on Bullingdon Green. Under 

 Headington Wick Copse. Sb. About a quarter of a mile north 

 from Upper Heyford; also in a bog north of the Parsonage 

 House. Bx. 



Per. July. 



Stems about one span, angular, twisted. Fl. foot-stalks three or 

 four times longer than the Is. Fl. pet. veined with greenish 

 ribs. Cor. elegant milk-white. Nect. balls yellow. 

 The stam. in succession, or nearly so, come over the stigm. and 



retire after shedding their pollen. The same phenomenon in the 



Rue, and in Saxifraga. 



A most elegant plant. Physiology of the Nect. unknown. 



PENTANDRIA PENTAGYNIA. 

 LINUM. Flax.' 



* Leaves alternate. 



(L. usitatissimiim. Common Flax. Calyx-leaves egg- 

 shaped, acute, with three ribs. Petals notched. Leaves 

 spear-shaped, alternate. Stem mostly solitary. E. B. 

 1357. C. 5. 22. L. sativum. G. E. 55Q. 



Ciiltivated fields. Broome, Warwickshire. Pn. 



An. July. 



Moot small, fibrous. Fl. blue. Caps, ending in a point.) 



(L. perenne. Perennial F. Calyx leaves inversely egg- 

 shaped, blunt, obscurely five-ribbed, naked. Leaves 

 linear-spear-shaped. Stems many, ascending. E. B. 

 40. 



Chalky hills. Sm. Northamptonshire. Bay. Worthorpe, and 

 on the balks about Bernack Heath, and Withering Heath. 

 Morton. 



Per. June, July. 



Boot much branched at the summit, woody. Ls. smaller and nar- 

 rower than in L. usitatissimum. Fl. blue, but smaller than in 

 the last. Caps, bluntish.) 



* * Leaves opposite. 



L. cathdrticum. Purging Flax. Mill-mountain. Leaves 

 opposite, inversely egg-spear-shaped. Panicle forked ; 



' Adk. Sax. 



