414 CANNABINACEJS. (HEMP FAMILY.) 



2. P. debilis, Forst. Pubescent with straight and hooked hairs inter- 

 mixed; stem much branched, pellucid; leaves ovate, mostly acuminate, but 

 obtuse, roughened with elevated dots ; clusters loose, spreading ; flowers as 

 long as the involucre. (P. Floridana, Nutt.) Damp shaded sandy soil near 

 the coast, Florida to North Carolina. June -Aug. (f) - Stem |- l long. 

 Leaves 6" - 9" long, about the length of the slender petiole. 



5. BCEHMEBIA, 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. Hough herbs with alternate or opposite petiolcd leaves. 



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

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

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

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

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

 Swampy thickets, Florida, and northward. July- Sept. )J. Stem l-3 

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



ORDER 123. CANNABINACE^E. (HEMP 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 1-leaved, embracing the 1-celled 

 ovary. Ovule solitary, erect. Stigmas 2, subulate, pubescent. Fruit in- 

 dehiscent. Albumen none. Embryo coiled or curved. 



1. HTJMULUS, L. HOP. 



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

 Bracts leafy, imbricated, 2-flowered, forming in fruit 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. Lupulus, L. Low grounds along the mountains, Georgia, and 

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

 Achenium covered with resinous yellowish odorous grains. 



ORDER 124. MORACE^3. (MULBERRY FAMILY.) 



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

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



