ig 2 FLOWERING PLANTS OF THE RIVIERA 



ones alternate. Stipules membranous. Flowers monoecious, 3-4 axillary, sessile, 

 small and green. Leaves petioled. 



Stony places in fields and road-sides and on old walls, common and often 

 overlooked in the littoral. March-May. 



HUMULUS L. 



H. Lupulus L. The Hop is found in hedges and by streams and other 

 shady places especially in the hills. June-August. 



PARIETARIA L. PELLITORY-OF-THE-WALL. 



P. ramiflora Mcench. This is much commoner in the south than the 

 British P. officinalis (Pellitory-of-the-Wall). The leaves are narrowed at 

 each end, the stems erect, and the perianth more bell-shaped. 



Rocks and old walls, very common throughout. May-October. 



P. lusitanica L. A small annual species with slender stems and small 

 oval petioled leaves, 3-nerved at the base. Flowers in small bundles of 3-5. 

 Bracts linear. Perianth-segments oval. 



Rocks and old walls in the Var. April-June. 



URTICA L. NETTLE. 



U. membranacea Pair. Differs from the common stinging nettles (U. 

 dioica and U. urens) by its unisexual or monoecious clusters, the males being 

 longer. The flowers inserted only on the upper face of the membranous rachis. 

 Clusters peduncled. Leaves large, broad, and thin. 



Waste places near houses and at the foot of walls. April-June. 



U. urens L., U. dioica L., and U. pilulifera L. (female flowers in 

 globular peduncled heads) are quite commom. 



CELTIACE^E. (Sometimes considered a tribe of Urticaceas.) 



CELTIS L. 



C. austral is L. A biggish tree. Leaves nettle-like, oval-lanceolate, 

 toothed, rough. Flowers hermaphrodite, axillary, solitary-pedicelled. Fruit 

 black, as large as a big pea, with one nut. 



Often planted, but probably native in rocky places here and there. March- 

 May. 



ULMACE/E. 

 ULMUS L. 



U. campestris i.. The common Elm is often planted and grows spon- 

 taneously here and there, and flowers from February to April according to situa- 

 tion, etc. The var. suberosa K. is also recorded from the Var. 



U. montana With. = U. glabra Huds. Wych Elm. This is not recorded 

 by Ardoino (" Fl. des Alpes-Marit.") nor by Albert and Jahandiez for the Var ; 

 but without having examined specimens we believe it occurs in both departments. 

 In the Gapeau Valley and by the R. Rubaud near Hyeres, this tree probably 

 appears. Mr. Bicknell has found it in woods west of Monte Alto. Prof. Penzig 

 believes it has not been seen before on the southern side of the central chain of 

 the Maritime Alps, but only U. diffusa and U. campestris ; but Bicknell has no 

 doubt about his plant, " the leaves being extremely scabrous on the upper sur- 

 face, bearded in the axils of the nerves underneath, lengthily and abruptly acu- 

 minate, and less deeply toothed than U. effusa " (" Fl. of Bordighera," p. 254). 



Morus alba L. and Morus nigra L., the white and black Mulberry trees, 

 are often seen cultivated, the latter chiefly in the lower mountains. 



CERATOPHYLLACE^E. 



Ceratophyllum demersum L. and C. submersum L. are found in 

 pools near Frejus. June-July. 



