310 OROBANCHE^E. [OROBANCHE. 



upper lip retuse, tip inflexed, lobes of lower lip toothed nearly equal, 

 stigma purple. On Picris, Cambridge, Kent, Surrey, Hants, Tenby. 

 Sub-sp. O. HED'ER^E, Duly, spike more lax, sepal si-nerved, stigma yellowish. 

 O. barbata, Bng. Bot. Suppl., not Poir. On Ivy, Wales, G-loster, Kent to 

 Cornwall; Ireland; Channel Islands. 



SECTION 2. Trionychon. Stem simple or branched. Flowers bracteate 

 and 2-bracteolate. Calyx tubular, 4-5-lobed. Capsule with the valves 

 free above. 



6. O. cseru'lea, Till. ; blue-purple, stem simple, calyx-lobes 4 lanceo- 

 late, corolla-tube curved, lobes of both lips acute, filaments almost 

 glabrous, suture of anthers glabrous, stigma white. 



Herts and Norfolk, and Hants to Cornwall, local ; Channel Islands ; fl. June- 

 Oct. Stem 6-12 in,, slender, tough, not tumid below. Spikes usually 

 dense; bracts lanceolate. Corolla-tube |-1 in., curved, upper lip 2-lobed, 

 lobes pale blue with darker veins. DISTRTB. From Holland southd., W. 

 Asia. 



Sub-sp. O. ARENA'RIA, Bork., found in Alderney, is distinguishable from 

 0. ccBru'lea by the hairy anthers. 



ORDER LVII. LENTIBULARI NEZE. 



Scapigerous herbs, chiefly aquatic or marsh. Leaves radical, crowded or 

 whorled, undivided or multifid, exstipulate. Flowers solitary racemed or 

 corymbose, irregular, bracteate. Calyx free, persistent, 2-labiate or 5-par- 

 tite. Corolla hypogynous, deciduous, personate or 2-lipped, tube short ; 

 upper lip short 2-fid, lower entire or 3-fid ; palate convex. Stamens 2, 

 opposite the lateral sepals, hypogynous or inserted on the corolla- tube, 

 filaments short arching ; anthers adnate, 1-celled, transversely 2-valved. 

 Disk 0. Ovary free, 1-celled ; style short, thick, stigma 2-lipped, upper 

 lip short, lower dilated ; ovules many, anatropous, placenta free basal 

 globose. Capsule 2-valved or bursting irregularly, many-seeded. Seeds 

 minute, oblong or peltate, placenta spongy, testa striate or pitted some- 

 times hairy, albumen ; embryo straight, sometimes undivided. 

 DISTRIB. Chiefly temp, and cold regions ; genera 4 ; species about 180. 

 AFFINITIES. With Scrophularinece. PROPERTIES unimportant. ; 



Terrestrial. Stamens on the base of the corolla-tnbe 1. Pinguicula. 



Aquatic. Stamens on the base of the lip of the corolla 2. Utricularia. 



1. PINGUl'CUIiA, Tournef. BUTTERWORT. 



Perennial, succulent, simple herbs. Leaves rosulate, quite entire, mar- 

 gins incurved ; surface cellular, insectivorous. Scapes axillary, ebracteate, 

 1-fld. Flowers yellow, white, or purple, inclined. Calyx unequally 5-par- 

 tite. Corolla ringent. Stamens hypogynous, filaments stout ascending ; 



