URTICE/E. 



331 



a. erecta, Koch. Barren Cal. equalling 

 stamens. 



/3. diffusa, Koch. Barren Cal. at last twice 

 as long as stamens. P. judaica of many 

 authors {not of Linn) belongs to diffusa. 

 Godron, 'Fl. de Lorr.,' %'^%, further dis- 

 tinguishes these. In P. erecta the bracts 

 are all separate, not decurrent ; in P. dif- 

 fusa theg are decurrent, and united at 

 the base into a sort of involucrum. 



2. lusitanica. L. small, ovate, 3-nerved 

 at base. Cymes solitary, axillary, about 3- 

 flowered. Bracts digitate. Segm. lineari-lan- 

 ceolate. Stem procumbent, filiform, a. 5, 6. 

 (p. Bert.) Walls, ^c. Rous. Toul. s. It. 

 Corsica. 



;8. filiformis. Ten. Div. of Involucrum 

 somewhat unequal. — Guss. 



3. Soleirolii. " L. small, nearly circular, 

 oblique at base. PL solitary, axillary. Stem 

 filifoi'm, procumbent, p. 5. Shady walls. 

 Cors. Sard." — Bert. 



4. cretica. " Annual. Stems filiform, 

 diffuse, mucb branched. L. rhombeo-ovate, 

 3-nerved, equal at base, dotted. Invol. com- 

 pressed, somewhat tubular at base. Segm. 

 lanceolate, two of them broader, longer, and 

 spatulate. a. 2, 3. Walls and rocks. Sic. 

 Islands." — Guss. 



Cannabis. 



Cannabis sativa, the common Hemp, a dicp.- 

 cious plant, with 5 stamens, 2 styles, a soKtary 

 nut, erect stems, and rough digitate L., some- 

 times occurs in field cultivation. 



732. HUMULUS. 



1. Iiupulus. Climbing. Fl. axillary : bar- 

 ren in racemes ; fertile in solitaiy catkins, p. 

 7. Hedges and thickets. Perhaps an escape. 



728. FICTJS. 



1. Carica. L. cordate, palmate, rough 

 above, pubescent beneath. s.T. Brg stony. 

 s. Fr. It. nat. 



MORUS. 



Two species of Morus (Mulberry) are planted 

 by the roadsides or in the fields in the s. of 

 Eur. : — M. alba, with a small white Fi\, and 

 with the Stigma and margin of Cal. hairless. 



cultivated for silkworms and as fodder for cattle ; 

 31. nigra, with a dark Fr., hairy Stigma, and 

 hairy margin to Cal., cultivated for its fruit. 



724. CELTIS. 



1. australis. L. oblongo -lanceolate, acu- 

 minate, sharply serrate, rough above, villous 

 beneath, unequal at base. Fr. solitary. T. 5. 

 s. Alps. It. 



725. ULMUS. 



[I follow Smith in the first five species of 

 this genus, as, on the whole, the most satisfac- 

 tory guide.] 



1. campestris. Caps, cloven to the place 

 of the seed, oblong, hairless. Fl. nearly ses- 

 sile. L. doubly serrate. l.T. 3, 4. In hedges. 



2. stiberosa. Caps, cloven to the place 

 of the seed, nearly circular, hairless. Fl. stalked. 

 L. doubly serrate. The corky bark is a mere 

 accident. l.T. 3. In hedge-rows. 



3. glabra. Caps, cloven to the place of 

 the seed, obovate, hairless. Fl. nearly sessile. 

 L. doubly serrate. An elegant tree, with small 

 L. and drooping branches, of which the young 

 shoots are smooth. l.T. 3. Hedges : abu7idant 

 in Essex and Hertfordshire. 



4. major. Caps, obovate, hairless: the 

 division not reaching half-way to the seed. Fl. 

 nearly sessile, 4-cleft. L. broad, unequally 

 serrate. Branches somewhat drooping. l.T. 

 3. Hedges and roadsides near London. 



5. montana. Caps, nearly circular, hair- 

 less : division not reaching half-way to seed. 

 Fl. stalked, 5- or 6-cleft. L. large, like those 

 of the Hazel. Branches sometimes di'ooping. 

 l.T. 3, 4. Hedges and woods. This is per- 

 haps the only Elm which is a native of Eng- 

 land. U. glabra has the next claim. The 



fruit is very large and conspicuous, lasting on 

 the tree to the end of May. 



6. efifusa. Caps, villoso-ciliate. Fl. stalked, 

 drooping. L. doubly serrate, T. 3, 4. foun- 

 tain woods. G. 



JUGLANS. 



Jziglatis regia, the Walnut, is planted exten- 

 sively in some countries, in fields and by road- 

 sides. 



2 u 2 



