114 CANNAlllNACKvK. (lIKMI' FAMILY.) 



2. P. debilis, Korst. ruln'sceiiit witli strai;,'lit iiiul Iiookfd hairs inter- 

 mixed ; sti'iii iiiurli bnxnclied, ])cilucid ; leaves ovate, Ino^;tlv• aeuiiiiiiate, but 

 obtuse, rou;^licncd with elevated dots ; elusteis loose, sjneading ; flowers as 

 long as the involucre. (P. Fioridana, A^«<<.) — Damp sha<led sandy soil near 

 the coast, Florida to North Carolina. June -Aug. (1) — Stem ^"-Ij^long 

 Leaves G" - 9" long, about the length of the slender petiole. 



5. BCEHMERIA, Jacq. Falsk-Nettle. 



Flowers mona?cious or ditt'cious, in s])ik('d clusters. Calyx of the sterile 

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

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

 the persistent calyx. — Kouj;h herbs with alternate or opposite petioled leaves. 



1. B. cylindriea, Willd. Pubescent and rough with straight and hooked 

 hairs ; loaves opposite and alternate, ovate and ovate-lanceolate, actiminate, ser- 

 rate, rounded and 3-ncrved at the base, on long or short petioles ; spikes axil- 

 lary, mostly leafy at the summit, the fertile ones comjiactly flowered, short; the 

 sterile interrupted, and sometimes longer than the leaves. (B. lateriflora, Muhl.) 

 — Swampy thickets, Florida, and northward. July-Sept. H. — Stem l°-3*' 

 high, mostly simple. Leaves 2'- 5' long. 



Order 123. CANNABUVACEiE. (IIkmp Family.) 



Erect or twining herbs, with opposite incised or lobed and stipulate 

 leaves, and dioecious flowers. Sterile flowers racemose or panicled. Ca- 

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

 Fertile flowers in bracted spikes. Calyx l-lcavod, embracing the 1-celled 

 ovaiy. Ovule solitary, erect. Stigmas 2, subulate, pubescent. Fi-uit in- 

 dehiscent. Albumen none. Embryo coiled or curved. 



1. HUMULUS, L. Hop. 



Sterile flowers panicled. Fertile flowers in short axillary and solitaiy spikes. 

 Bracts leafy, imbricated, 2-flowered, fonning in fniit a membranaceous cone. 

 Calyx enlarged in fruit. Embryo spirally coiled. — A rough perennial twining 

 herb, with cordate 3 - 5-lobed leaves, and greenish-yellow flowers. 



1. H. XjUpulus, L. — Low grounds along the moimtains, Georgia, and 

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

 Aehenium covered with resinous yellowish odorous grains. 



Order 124. 3IORACE.E. (Mulberry Family.) 



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

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



