194 DIOECIA, HEXANDRIA. 
Rough-fruited Acnida. 
From three to four feet high, and robust, having the habit 
of an Amaranthus. On the bank walk from Gray’s ferry to 
Kingsess gardens, and on that from the Navy-yard to Glou- 
cester point. Scarce. Annual. July, August. 
376. HUMULUS. Gen. pi. 1523. {Urtica,) 
Masc. Calix 5-leaved. Corolla none. Fem. 
Calix 1 -leaved, obliquely spreading, en- 
tire. Corolla none. I^yles 2. Seed 1, with- 
in the leafy calix, (or strobilus.) — ^utt. 
Xupulas. 1. H. 
Hop. 
Common Hop, so useful in the brewing of malt liquor, is 
unquestionably indiginous on the shores of the Schuylkill 
and Delaware, in thickets, and in other places in the vicinity. 
Perennial. August. 
ORDER VI. HEXANDRIA. 
377. SMILAX. Gen. pi. 1528. {Asparagi.) 
Masc. Calix 6-leaved. Corolla none. An- 
thers adnate to the filaments. Fem. Flow- 
er similar to the male. Stijle minute. Stig- 
mas 3. Berry 3-celled, superior; 1, 2, or 
3- seeded.— 
wtuBdifoiia. 1. S. soraewliat prickly ; leaves rotund-ovate, acu- 
minate, very even, cordate, 5-nerved ; berries 
spherical. — Willd. and Pursh. 
Round-leaved Smilax. Green Briar, 
Common in hedges and thickets. Leaves very large. 
No, 2, and this species form impenetrable thickets in many 
