262 27. Buxus. 10. EUPHORBIACEiE. PI. ex . mon. 
Buxus sempervirens . Evergreen lox . 
Leaves ovate ; edge of the petiole rather hairy ; anthers 
ovate, arrowshape. 
Buxus, Raii Syn. 445, 1 ; Ger. eni. 1410. 
Buxus arbor vulgaris, Park. 1428. 
Buxus sempervirens, Lin. S. P. 1394. 
Chalky hills; arborescent; April. 
Tree low, bald; leaves often nicked, shining; flowers 
yellowish. — Wood yellowish, very hard, smooth and tough; 
also sudorific ; leaves cathartic and vermifuge. 
/3. angustifolia . Stem arborescent ; leaves lanceolate. 
Buxus augustifolia, Raii Syn. 445, 2. 
y. subfruticosa . Stem low, rather shrubby ; leaves 
small, reverse ovate. 
Fam. XI. 11. ARISTOLOCHLE. Jussieu. 
Perigonium simple, adherent, 1 -leafed, 1-sepaled, few- 
lobed, semi-petaloid ; aestivation valvular ; stamens definite 
6 or 12, epigynous, sessile; style short; stigma many-lobed; 
carcerule coriaceous, 6 or 8-celled ; dissepiments vertical ; 
placentarium axillary; seed horizontal or ascending; cor- 
culum small, cordate, hidden, basilary ; perisperm horny, 
radicle below. 
Perigonium tubular, apex ligulate . . Aristolochia. 28, 
Perigonium campanulate, 3-lobed Asarum. 29. 
I. 28. ARISTOLOCHIA. Dioscorides. Birthwort, 
Perigonium tubular, bellied at bottom, dilated at top, 
ligulate ; stamens 6, on the style ; filaments very short, bear- 
ing the anther on one side ; style very short, thick ; stigma 
6-cut ; >t carcerule 6-celled, dissepiments membranaceous, 
not 2-partile ; seeds horizontal, incumbent, flat, not mar- 
gined, winged below. — Stem volubile or erect ; leaves alter- 
nate, pedately veined; stipule 0; flowers axillary. 
Aristolochia infesta. Troublesome birthwort . 
Leaves petiolate, roundish, heartshape, rather blunt; stem 
upright; peduncles 1 -flowered, aggregate; perigonium gp^ 
right; hp oblong. 
Aristolochia Saracenica, Ger. em. 847, 4. 
Aristolochia Clematith, Lin. S. P 1364. 
Aristolochia infesta, Salisb. Prod. 215, 
Saracen's Birthwort. 
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