DIOECIA.— IIKXANDR1A. 



,79. ZANTHOXYLUM. Tooth-ach tree. Rutacea. 



A. fraxineum : prickly ; leaves pinnate ; leaflets oval- 

 lanceolate, Mibentire, sessile, equal at the base ; 

 petioles unarmed ; umbels axillary. 

 IIAB. Rocky woods. April. Shrub 3-V5 ft. high; 

 prickles strung ; leafl. 4 — 5 pairs. 



500. ACNIDA. Wild-hemp. Chenopodecz. 



I. A. cannabina : leaves ovate-lanceolate; capsules 



smooth, acutely angled. 

 IIAB. Salt marshes. July — Aug. © . Stem 2— 



4 ft. high, smooth; Icav. alt. ; jl. small, gr. 

 .'. A. rusocarpa : leaves oval-lanceolate ; capsules ob 



tusely angled, rugose. 

 IIAB. Fresh -water marshes. July. ©• + 



501. 1IUMULUS. Hop. Urjicece. 



II. Lupulus. 



IIAB. Hedges, kc. Aug. U. Stem tivin., sea 

 Irons ; Icav. oppos., 3 — 5-lob., rough ; fl. gr. 



IIEXANDRIA. 



►82. SMILAX. Rough bind-weed. Asparageo <.. 



'•■'• Stemfrutescent. 



>. S'» Sarsapurilla ': stem prickly, slightly 4-angled ; 

 leaves unarmed, ovate-lanceolate, cuspidate, some- 

 what 5- nerved, glaucous beneath ; peduncles 

 longer than the petioles. 

 IIAB. Low thickets. July. Stem climbing ; prickle: 

 scattered ; lev. black, 3-seeded. 

 .». S. rotundifolia : stem prickly, subterete ; leaves 

 unarmed, roundish-ovate, short-acuminate; cord 

 ;it<\ 5 — 7-nerved ; berries spherical. 

 IIAB. Hedges, &c. June. Stem climb.; branch 



(juadrang. ; br.r. black ; fl. umbel. 

 S, caduca : prickly ; leaves ovate, mucronate, mem 

 brauacrous, 5-nervrd ; common peduncles scarce- 

 ly longer than the petiolea. 

 I i 2 



