CL. XT.] TETRADYNAMIA. 263 



5. O. riibra. Red Broom-rape. Stem simple ; corolla somewhat 

 tumid ; upper lip cleft, lower in three nearly equal, obtuse lobes ; 



stamens fringed ; style partially hairy. Stem about eight inches 



high, simple, swelled at the lower part, purplish -red, tinged with 

 yellow : scales dark-brown : calyx-leaves lance-shaped : spike of 

 rather close flowers, dusky-red. The whole plant, excepting the 

 scales, is covered with very short glandular hairs. Annual: 

 flowers in July : grows in gravelly soil, in rocky places, in Scot- 

 land and Ireland ; near Seafield Tower, on the coast of _Pife, on 

 disintegrated trap ; island of Stafia, on basaltic rocks ; island of 

 Harris, at Craig-camna, on Gneiss. Eng. Bot. vol. xxv. pi. 1786. 

 Eng. FL vol. iii. p. 148. 926. 



6. O. ccerulea. Purple Broom-rape* Stem simple; bracteas 

 three ; upper lip of the corolla cleft and notched, lower in three 



equal lance-shaped segments ; style downy, Stem a foot high, 



dark-grey, angular : scales brown : calyx-leaves united, cleft : 

 corolla funnel-shaped, greyish-purple : filaments smooth. The 

 whole plant minutely downy. Perennial : flowers in July : grows 

 in grassy pastures near the sea, the root parasitical on other plants : 

 rare. Eng, Bot, vol. vi. pi- 423. Eng. Fl. vol. iii. p. 149. 927. 



7. O. ramosa. Branched Broom-rape. Stem branched ; brac- 

 teas three ; upper lip of the corolla deeply cleft, lower with three 



equal lobes, all the segments rounded ; style smoothish. 



Flowers light-purple, in a loose spike. Annual : flowers in Au- 

 gust and September : grows in moist fields, parasitical on the roots 

 of hemp : rare. Eng, Bot. vol. iii. pi. 184. Eng. Fi. vol. iii. p. 150. 



928. 



CLASS XV. TETRADYNAMIA. 



Plants bearing Flowers with Six Stamens, of which four are 

 longer than the other two. 



(The flowers have invariably four petals.) 



Order I. SILICULOSA. Seeds inclosed in a short 

 pod or pouch. 



* Pouch entire at the top, 



2. DBA'BA. Pouch entire, oval ; valves nearly flat. Seeds nu- 



merous. 



5. HUTCHI'NSIA. Pouch entire ; valves keeled, not bordered. 

 Seeds at least two in each cell. 



3. ALY'SSUM. Pouch entire, bordered, laterally compressed, 



with concave valves. Seeds one or two in each cell. 



10. COCHLEA'RIA. Pouch nearly entire, turgid, wrinkled, two- 



valved. Seeds numerous. 



1. SUBULA'RIA. Pouch entire, transversely compressed, with 

 tumid valves. Seeds numerous. 



4. CAMELI'NA. Pouch entire, with tumid valves. Seeds nu- 



merous. 



11. SENEBIE'RA. Pouch nearly entire, transversely compressed, 



wrinkled, two-celled, two-valved. One seed in each cell. 



