MONOECIA. TETRANDRIA. 101 



323. MORUS. Nutt. Gen. 743. 

 [Gr. Amauros, dark; or from the Celtic, Mor, black; the color of the fruit- De Tlteis.] 



Sometimes Dioicous: MAi,r., Ament loose. Ca/. 4 parted. Cor. 0. 



FsM- Ament deme. Ca/. 4 leaved, becoming a 6erry. Cor. 0. Styks2. Seed 1. 

 M. RUBRA. ALc. Arb. Dioicous; leaves cordate, or lobate, scabrous; female ament cylindric. 

 Vufgo—Red Mulberry. 



Fl. Middle of May. Fr. mat. Latter end of June. 



Hab- Rich woodlands: fence rows, &c. frequent. 1.5, to 20 or 30 feet high: fruit dark purple. 



Obs. The fruit of this well known tree is much admired by some; though it is rarely cultivated for that 

 object. The wood is remarkably durable, and valuable for posts, &c. 



M. ALBA. Ell. Monoicous; leaves cordate, oblique at base, ovate, or lobate, glabrous. 

 J'M/g-o— White Mulberry, 



Fl. Middle of May. Fr. mat. Latter end of June. 



Hab. Fence-rows: Jos. Townsend's farm: not common. 15 to 20 feet high: fruit white. 



Obs. This foreign tree occurs about some old settlements, where it was formerly introduced, with a view 

 to raise Silk-worms: but the business has been abandoned for many j'ears, in this vicinity. I have speci- 

 mens, from near Birmingham Meeting-house, which fit Willdenow's description of M. tatarica precisely; 

 which species, however, he seems to think is only a variety of the M- alba. 



324. XANTHIUM. Nidi. Gen. 704. 

 [Gr. Xanthos, yellow; a color said to be produced by the unripe fruit of the plant.] 

 Male, Cal. many leaved, imbricate. Cor- 5 cleft, funnel-form. Recept. chaffy. 

 Fem. /nuo/itcrc 2 leaved, 1 flowered. Cor. 0. Z>rM;je dry, muricate, bifid. i\"t/f 2 celled. 

 X. STRUMARiUM. Ell. Stem branched, Unarmed; leaves cordate, rough; fruit elliptic, bristles hooked. 

 r((/g-o— Clot-bur. Clot-weed. Lesser Burdock. Cockle-bur. 

 Fl. Latter end of August, and after. Fr. mat. Middle of October. 



Hah. Farm yards, lanes, roadsides, &c. frequent. 1 to 3 feet high: flowers greenish. 



Obs. This is an obnoxious weed— the burs often matting, and injuring the fleeces of sheep, &c. Mr. 

 Xuttall says it is "indigenous to the remotest parts of upper Louisiana:" but it has very much the appear- 

 .-ince of a naturalized stranger here. The X. fpinosum, a still viler weed, has not reached this region yet. 

 1 hn\ e not met with it nearer than the District of Columbia. 



With great deference to the superior judgment of those able botanists who have removed this, and the 

 following genus, to Si/ngenesia, I cannot help thinking that Monoecia is the proper class for them. 



325. AMBROSIA. JVutt. Gen. 703. 

 [A poetical ii::me: the food of the Gods; but certainly indiilerent food for vwrtals.1 

 M ALE, in spikes. C.;/. 1 leaved, many flowered. Cor. 1 petalled, funnel-form, 5 cleft. Recept. naked. 

 Fem. clustered. Cal. 1 leaved, entire, belly 5 toothed. Cor. 0. A'ni from the indurated calyx, 1 seeded, 

 A- TRiFiDA. Ell. Hirsute; scabrous; leaves mostly opposite, deeply 3 lobed, serrate; fruit 6 toothed, 

 F/. Middle of August. Fr wai:. Beginning of October- 



Hab. Fence-rows; thickets, &c. frequent. 3, to C or S feet high: male spikes greenish yellow. 



A. ARTEMISIFOLIA-' Ell. Stempilosc; leaves bipinnatifid, upper ones pinnatifid; racemes in 3's, terminal. 

 .S'vdon. A. absynthifolia.' M.v. Ftt/g:o— Bitter-weed. Rag-weed. Wild Wormwood. Hog-weed. 



Fl. Latter end of August, and after. Fr. mat. Middle of October. 



Hab- Pastures; stubble fields, &c. very common. 1, to 3 or 4 feet high- 



Obx. This abundant, and worthless weed, I take to be t!i.- A. artemisifolia of the books; and yet the peti- 

 oles are conspicuously ciliate. If we have the A. tlalior, I have not yet distinguished it from this. 



326. AMARANTHUS. Ahtlt. Gen. 746. 

 [Gr. a, not, maraino, to wither, and Anthos, a flower; the flowers remaining unchanged, in drying] 

 Male, Cal. 3 or 5 leaved, persistent, mostly colored. Cor. 0. Stamens 5, or 3. 

 Fem. Cal. as in the male. Co*-. 0. Styles about 3. Caps. 1 celled, circumsci.ssed. Seed 1. 



A. Ai^Bus. Ph. Glomerules axillary, triandrous: Ieave= obovate, reiusp, with a small bristle in the sinus- 

 ri(/go~Wliite Amaranth. Careless. 



