298 ORDER 114. UKTICACE^E. 



11. PAOHYSANDRA, MX. Flowers 9 , apetalous, in brae ted spikes 

 Calyx 4-parted. $ Filaments 4, long-exserted, flat. 5 Styles 3, recurved 

 Capsule 3-horned, 3-celled, cells 2-seeded. U Procumbent stems from 

 long creeping root-stocks. Leaves alternate. 



P. proeumbens MX. LVB. ovate to obovate, coarsely toothed, clustered above the 

 spikes, which are all near the base of the stem. Va. to Xy., and 8. March May. 



12. BUXUS, L. BOXWOOD. Flowers s , axillary. $ Calyx 3-leaved, 

 petals 2. Sta. 4. S Cal. 4-sepalled. Pet. 3. Sty. 3. Caps, with 3 beaks 

 and 3 cells. Seeds 6. > b Leaves opposite, ovate, entire, smooth. 



H. 8EMPERVIRENB. A tree of slow growth, fine-grained wood, in Europe. The dwarfed 

 varieties are planted in gardens for edgings. 



ORDER CXIV. URTTCACE^E. NETTLEWORTS. 



Plants of various habit, with stipules (which are often early deciduous) 

 and with small inconspicuous, mostly diclinous flowers. Calyx regular, 

 free from the 1-celled ovary. Sttimens as many as the calyx lobes and op- 

 posite to them. Fruit a 1 -seeded samara, drupe or achenium, separate or 

 aggregated. The following groups have usually been regarded as Orders 



* ULM ACK/E. Tree* with colorless innoxious Juice. Flowers habitually perfect, not 



in anients. Fruits separate. No albumen. (Figs. 181, 256, 295, 316, 382, 509). . .(a) 

 J ARTOCARPE.*. Treat with milky poisonous juice. Flowers diclinous, in amenta 



or heads. Fruits aggregated. Seed albuminous. (Figs. 195-6. 298, 349) ... (6) 

 tS URTICEjE. Uerfa. Flowers diclinous, not in aments. Filaments crenulate. 



Fertite calyx 3-5-parted. Embryo straight. (Fig. 503)... (e) 



J8SS CANNABINE^E. Herbn. Flowers diclinous. Filaments straight. Fertile calyx 

 of 1 sepal, spatho-like. Embryo curved or coiled. (Fig. 213). . .(d) 



a Flowers appearing before the leaves. Fruit a samara winged all around ULM us. I 



a Flowers with the leaves. Fruit wingless, x a dry nut from a 1-celled ovary. . . PLANERA. I 



x a sweet, fleshy drupe CKI.TIS. 3 



6 Flowers enclosed within a hollow receptacle, both kinds together Ficus. 4 



\ Flowers external. y Fertile aments globular. Branches thorny MACLCRA. 5 



;/ Fertile aments globular. Plants thornless BROCSSOXKTK 6 



y Fertile aments oblong, fruit sweet, juicy MOKUS. 7 



e Herbs with stinging hairs. z Stamens 4. Leaves opposite U KTICA. 8 



z Stamens 5. Leaves alternate LACORTKA. 9 



e Herbs stlngless. n Stamens 3. Fertile calyx 3-sepalled. . . PII.F.A. 10 



n Stamens 4. o Flowers in slender spikes BOJBMKRIA. 11 



o Flowers in involucrate clusters PARIKTARIA 12 



d Herbs twining. Fruit in an imbricate strobile-like ament HUMULUS. 13 



d Herbs erect. Fruit a 2-yalved caryopsis in axillary pairs CANNABINUM. 14 



1. ULMUS, L. ELM. Fls. . Calyx 4-9-cleft, Stam. 49, fil. long 

 and slender. Styles 2. Ovary 2-celled. Samara flat, 1 -seeded. J> Fls. 

 yellowish, or reddish, in precocious clusters. Figs. 181, 256, 295. 



* Samara fringed *ith hairs, hanging on slender ped., 3-beaked Nos. 1 3 



* Samara not friuged, nearly sessile, x slightly notched at apex Nos. 4, 5 



x cleft down to the seed Nos. 6, 7 



1 U Americana L. White Elm. Lvs. oval, acuminate, doubly serrate ; flowers in 

 eoso, umbel-like clusters ; fruit oval, 6", its 2 beaks with points incurved and meet- 

 lug. A majestic tree, with ascending branches and often long pendulous " weeping" 

 branchlets. Native, and everywhere cnltitsted. 



