orob.vis'ciiacejE. L98 



below the constriction in the corolla-tube ; filaments sub-glabrous ; 

 anthers not hairy on the sutures. Stigma white. 



Parasitical on Achilkca Millefolium. Bare. 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. 



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

 'fhe 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 O. arenaria, of which I have not seen fresh specimens, it 

 is said to be yellow or orange. 



Purple Broom-rape. 



French, Orolanche Bleue. German, Blauliche Sommerwwrz. 



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

 plants. 



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



Flowers 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 IV— OROBANCHE RAPUM. TkuUl. 



Plate MX. 



Reich. Ic. PL Germ, et Helv. Vol. XX. Tab. MDCCLXXVIII. 



O. major, " Linn." 8m. Eug. Bot. No. 421. Book. & Am. Brit. Fl. ed. viii. p. 300. 

 Benlh. Handbook Brit. Fl. p. 386. 



Flowers 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 



