OROBANCHACE^. 193 



below the constriction in the corolla-tube ; filaments sub-'»-labrous : 

 anthers not hairy on the sutures. Stigma white. 



Parasitical on Achillaea Millefolium. Rare. In Hertfordshire ; 

 the Isle of Wight ; Penzance, Cornwall ; Norfolk ; Chepstow, 

 Monmouth. I have collected it only in Jersey, where it is abun- 

 dant, apparently preferring the tops of walls which have a turf 

 coping. 



England. Perennial. Summer. 



Stem 6 inches to 1 foot high, tough, with strapshaped lanceolate 

 scales towards the base, which is not conspicuously dilated. Flowers 

 f to 1 inch long, dull bluish-purple with darker stripes ; the base of 

 the under lip nearly white. Plant glandular-pubescent, especially 

 in the upper part, with longer hairs on the inside of the lower lip. 



0. caerulea comes very near to O. arenaria, but is smaller, with 

 the corolla-tube more curved and less enlarged towards the apex, 

 and the lobes of the lower lip are much more acute ; the anthers 

 without a line of hairs at the sutures ; the stigma is waxy-white, 

 while in 0. arenaria, of which I have not seen fresh specimens, it 

 is said to be yellow or orange. 



JPurple Broom-rape. 



French, Orobanche Bleue. German, Blduliche Somrnerumrz. 



This plant is found chiefly near the sea, and is parasitic on various herbaceous 

 plants. 



Sub-Genus II.— EU-OUOBANCHE. (Orobanche, C. A. Meyer.) 



Elowers each with a single bract beneath it, but no lateral 

 ones. Calyx of 2 separate portions, divided from each other to 

 the base on the upper and under side, each portion frequently 

 2- cleft. Stem unbranched, or only accidentally so. 



SPECIES lY.— OROBANCHE RAPUM. TlmUu/frj 



Plate MX. ^^>4^^ ^' 



Reich. Ic. Fl. Germ, et Helv. Vol. XX. Tab. MDCCLXXVITL l^ ' ^ 



O. major, " Linnr Sm. Eng. Bot. No. 421. Hook. & Am. Brit. Fl. ed. viil p. SOO. 

 Benth. Handbook Brit. Fl. p. 386. 



Elowers ascending, erect. Bracts more or less exceeding the 

 flowers. Sepals bifid, more rarely entire, about as long as the 

 tube of the corolla ; upper segment with a strong mid-vein and 

 an inconspicuous one on each side of it. Corolla pubescent with 



VOL. VI. 2 c 



