TJRTICACE*. 199 



Stoobdeb m. URTI'CE^. (Nettle Familt.) 



Herbs with watery juice and opposite or alternate leaves, 

 often beset ■with stinging hairs. Flowers monoecious or 

 dioecious, in spikes or racemes. Stamens as many as the 

 sepals. Style oaly 1. Ovary 1-celled. Fruit an achene. 



4. llrtl'ca. Leaves opposite. Plant beset with stinging hairs. Sepals 



4 in both sterile and fertile flowers. Stamens 4. Stigma a small 

 sessile taft. Achene flat, enclosed between the 2 larger sepals. 

 Flowers greenish.. 



5. Laport'ea. Leaves alternate. Plant beset with stinging hairs 



Sepals 5 In the sterile flowers, 4 in the fertile, 2 of them much 

 smaller than the othbr 2. Stigma awl-shaped. Achene flat, oerj^ 

 oblique, refiexed on its toinged pedicel. 



6. Pll'ea. Leaves opposite. Wholeplant very smooth and semi-trans- 



parent. Sepals and stamens 3-4. Stigma a sessile tuft. 



7. Boehme'rls. Leaves mostly opposite. No stinging hairs. Sepals 



and stamens 4 In the sterile flowers. Calyx tabular or urn-shaped 

 in the fertile ones, and enclosing the achene. Stigma long and 

 thread-like. 



8. Farieta'ria. Leaves alternate, enilre, 3-ribbed. No stinging hairs. 



Flowers polygamous. In involucrace-bracted cymose axillary clus- 

 ters. Calyx of the pistillate flowers tubular or bell-shaped, 4-lobed. 

 Stigma tufted. Stamlnate flowers neatly as In the last 



SuBosDEB IV. CANNABIN'KS. pHjatp Family.) 



Eough herbs with watery juice and tough tark. Leaves 

 opposite and palmately divided or lobed. Flowers dioecious. 

 Sterile ones in compound racemes ; stamens 6 ; sepals 5. 

 Fertile ones in crowded clusters ; sepal only 1, embracing 

 the achene. Stigmas 2. 



9. Can'nabls. A ratber tall rongh plant with palmately compound 



leaves of 5-7 linear-lanceolate serrate leaflets. Fertile flowers 

 spiked-clustered. 

 16. Ha'mnliis. Leaves 3-5-lobed. Plant climbing. Fertile flowers in 

 a short spike, forming a membranaceous catkin In fruit. 



1. VliHDS, L. Elm. 

 1. U. fulva, Miohx. (Ebd or Slippebt Elm.) Flowers 

 nearly sessile. Leaves very rough above, taper- pointed. Buds 

 Jowny with rusty hairs. A medium-sized tree, with muci- 

 laginous inner bark. 



