300 ORDEK 114. URTICACEJE. 



the cylindric, the 2 globular, style lateral, ovary becoming a fleshy club- 

 shaped 1-seeded fr. protruding from the tubular, 3- or 4-toothed calyx. ^> 

 B. PAPYKIFKRA. Tree with a low bushy head, of rapid growth, with rough and downy 

 leaves, ovate or variously lobed ; fruit dark red, hispid. Japan. Fig. 349. 



7. MORUS, Toum. MULBERRY. Fls. 8 , in aments, the $ loose, the ? 

 dense and spike-like. Cal. 4-parted, sta. 4, sty. 2. Achenium compressed, 

 enclosed in the fleshy calyx, the whole spike thus constituting a compound 

 beny (sorosis). ^ Leaves alternate, broad, often palniately lobed. Fig. 196. 



1 M. rubra L. Tree or shrub, 15 GOf; roots yellow; leaves rough and downy, sub- 



cordate, serrate ; fertile spikes cylindric ; fruit dark red, very sweet. 



2 M. AI^BA. Chinese M, Shrubs (here), with smooth and shining, cordate, unequally 



serrate leaves ; fruit whitish. Introduced for silkworms. 



3 HI. NIGRA. Tree for or uament and shade, from Persia, with rough, ovate or lobe<? 



leaves ; fertile spikes oval ; fruit reddish-black, acid. 



8. URTiOA, Tourn. NETTLE. Fls. 6* , sometimes $ ? . $ Calyx 4-. 

 sepalled. Ovary a cup-shaped rudiment. Sta. 4. $ Sepals 4, the outer 

 pair minute, the inner at length surrounding the shining, compressed 

 achenium. Stig. .1, sessile. Herbs with stinging hairs. Leaves opposite. 

 Fls. green, in axillary or subterminal clusters or racemes. Summer. Fig. 503. 



Clusters compound, longer than the petioles. Perennials Nos. 1, 2 



Clusters simple, shorter, or not longer than the petioles. Annuals Nos. 3, 4 



1 U. procera Willd. Stem tall (3 6f ), slightly hispid, with few stings ; leaves lance- 



ovate, 5-veined, uncinate-serrate ; spikes panicled above. Waste places : common. 



2 U. dloica L. St. 1 3f, very hispid and stinging ; leaves ovate, deeply serrate, the 



slender point entire ; spikes clustered in the axils. Wastes : common. 



3 U. urens L. Low (If), hairy; Ivs. broadly ovate, coarsely serrate, 5-veined ; clus- 



ters pedunculate, loose, by pair? in each axil. Waste grounds, E. 



4 U. cliamsedrioides Ph. St. 1 2f, with scattered bristles ; leaves ovate, crenate- 



serrate ; clusters capitate, 1 or 2 in each axil, spiked above. Ky., and S. 



9. LAPORTEA, Gaudich. WOOD NETTLE. Fls. in axillary panicles, 

 the $ calyx 5-parted, the ? of 4 sepals, the 2 inner larger. Sta. 5. Stig. 

 subulate. Achenium flat, ovate, very oblique. 2 Hairs stinging. Lvs. 

 ample, ovate, petiolate. 



Li. Canadensis Gaud. Leaves 35', acuminate, serrate ; flowers minute, green, in 

 panicles, 12', the lower sterile. Damp woods. 2 6f. 



10. PILE A, Lindl. RICHWEED. Fls. in dense axillary clusters, the 

 with 3 or 4 sep. and sta. $ Sepals 3, unequal, oblong. Sta. 3 rudiments. 

 Achenia roughened, erect, ovate. Smooth, stingless. Stipules united. 



P. p u mil a Gray. Stem succulent, weak; leaves rhomb-ovate, crenate-serrate, long- 

 stalked ; flowers green, in short cluster*. Moist shades. 318'. July, Aug. 



11. BCEHMERIA, Jacq. FALSE NETTLE. $ Calyx 4-parted, with 

 lanceolate, acute segments. Stamens 4. ? Calyx tubular, truncate, or 4- 

 toothed, persistent and closely investing the ovate, pointed achenium. 

 Herbs or shrubs, stingless. Flowers minute. 



B, cylindrica Willd. Erect, simple; leaves generally opposite, on long petioles, 



