MOKACE^. (MULBEKRY FAMILY.) 437 



long as the involucre. — Damp shaded sandy soil near the coast, Florida to 

 North Carolina. June -August, (l) — Stem ^° - 1 1° long. Leaves 6"- 9'' 

 long, about the length of the slender petiole. 



5. BCEHMERIA, Jacq. False Nettle. 



Flowers monoecious or dioecious, in spiked clusters. Calyx of the sterile 

 flowers 4 - 5-cleft. Stamens 4-5. Calyx of the fertile flowers tubular, 4 - 5- 

 toothed or entire. Stigma subulate, hairy. Achenium elliptical, enclosed in 

 the persistent calyx. — Rough herbs with alternate or opposite jjetioled 

 leaves. 



I. B. oylindrica, Willd. Pubescent and rough with straight and hooked 

 hairs ; leaves opposite and alternate, ovate and ovate-lanceolate, acuminate, 

 serrate, rounded and-3-nerved at the base, on' long or short petioles; spikes 

 axillary, mostly leafy at the summit, the fertile ones compactly flowered, 

 short ; the sterile interrupted, and sometimes longer than the leaves. — 

 Swampy thickets. July -Sept. 11 — Stem l°-3° high, mostly simple. 

 Leaves 2' -5' long. 



Order 123. CANNABINACE^. (Hemp Family.) 



Erect or twining herbs, with oppo-site incised or lobed and stipu- 

 late leaves, and dioecious flowers. Sterile flowers racemose or panicled. 

 Calyx 5-sepalous. Stamens 5, opposite the sepals, not inflexed in the 

 bud. Fertile flowers in bracted spikes. Calyx l-leaved, embracing 

 the 1-celled ovary. Ovule solitary, erect. Stigmas 2. subulate, pu- 

 bescent. Fruit indehiscent. Albumen none. Embryo coiled or 

 curved. 



1. HUMULUS, L. Hop. 



Sterile flowers panicled. Fertile flowers in short axillary and solitary 

 spikes. Bracts leafy, imbricated, 2-flowered, forming in fruit a mem- 

 branaceous cone. Calyx enlarged in fruit. Embryo spirally coiled. — A 

 rough perennial twining herb, with cordate 3-5-lobed leaves, and greeni.sh 

 yellow flowers. 



1. H. Lupulus, L. — Low grounds along the mountains. Ceorgia, and 

 northward. .June -July. — Stem 6° -10° high. Leaves petioled, serrate. 

 Achenium covered with resinous yellowish odorous grains. 



Order 124. MORACE^. (Mulberry Family.) 



Trees or shrubs, with milky juice, alternate leaves, with large decid- 

 uous stipules, and monoecious or dioecious flowers, crowded in spikes 

 or heads, or enclosed in the fleshy receptacle. — Calyx of the sterile 

 flowers 3 - 4-lobed. Stamens 3-4, inserted on the base of the calyx. 



