294 "5. tjrticacejE. 



parallel in pairs bluntly Tceeled on the back, styles divaricate and 

 reflexed over the sides of the fruit, bracts 0. — E. B. S. 2606. — 

 L. linear, upper ones broader in the middle. Fr. stalked, small, 

 the size of that of C. verna. — 0. sessilis (Bab.) ; 1. Unear, upper 

 floating 1. ovate-spathulate, fr. sessile. I have never been able 

 to find any bracts to the fl. of this plant. It is only in that 

 respect that it differs from C hamulata (Kiitz.) which has falcate 

 deciduous bracts. — Marshes. j3. Lakes. A. or P. VI. — IX. 



4. C autumnalis (L.) ; fr. nearly sessile, lobes spreading in a 

 star broadly and acutely winged at the back, styles spreading, 

 bracts 0, 1. all linear and broadest at the base.— .E. B. S. 2732. — 

 Fr. 4 times as large as in C. verna, dark brown, 1 or 2 of the lobes 

 often abortive. L. dark green, all submersed, very abrupt at the 

 end. — Rare. Anglesea. Several Scottish lakes. Cong, Mayo. 

 A. or P. VI.— IX. 



Order LXXV. URTICACEiE. 



Fl. monoecious, dioecious, or rarely perfect. Perianth inferior, 

 4 — 3 — 6-parted, imbricate or entire in the female flowers. Stam. 

 definite, free, inserted at the base of the perianth and opposite to 

 its lobes. Ovary free, I -celled ; ovules solitary. Stigmas 1 — 2. 

 Fr. not bursting.— See G. F. G. Monochl. 28. 29. 30. 



1. Parietaria. Fl.polygamous, surrounded by an involucre. 

 Perigone bellshaped, 4-parted. Stam. 4. Style filiform. 



2. Urtica. Fl. monoecious or dioecious. Males in loose 

 racemes; perianth 4-parted; stam. 4. Females in capitate 

 racemes ; perigone 2-parted ; stigma sessile. 



3. HuMULUS. Fl. dioecious. Males with the perianth 5- 

 parted; stam. 6. Females with the perigone scalelike, open, 

 hidden by the scales of an oval catkin; stigmas 2, elongated. 



1 . Parietaria Linn. Wall Pelletory. 



1. P. erecta (Koch); 1. oblong-oval attenuate at both ends 

 tripliveined, perianth bellshaped equalling the stamens. — St. 

 mostly erect and simple or with a few short branches falling 

 short of the leaves. Inv. of two 3-lobed 3-flowered segments 

 with a female fl. between them, and two small simple segments 

 alternating with them ; each lateral lobe of each segment bearing 

 a pan- of small leaves on its face with the lateral fl. between 

 them.— Old walls. P. VL— IX. 



2. P. difusa (Koch) ; 1. oval acute at both ends tripliveined, 

 perianth, of perfect fl. ultimately elongated and twice as long as 

 the stam. (red).— P. officinalis Sm., E. B. 879.— St. prostrate or 



