ARUM— ASCLEPIA8- 



77 



ahrota'nnm, (southern-wood, 2X- and 

 ip.) stem straight; lower loaves bipinnate ; 

 upper ones hair-form, pinnate : calyx pu- 

 bescent, hemispheric. Ex. 



cana(ilen"i>is, (wild wormwood, w. y. Au. 

 2X-) 6ub-decumbent, scarcely pubescent; 

 leaves flat, linear pinratiiid ; branchlets 

 spike-flowered ; flowers sub-hemispheric ; 

 involucre ecarious. Receptacles smooth. 

 3-4 f. 



cmida'ta, [11. ) stem simple, herbaceous, 

 much branched, pyramidal; radical and 

 cauline leaves bipinnate, pubescent; up- 

 per ones pinnate, with sub-setaceous, 

 alternate, divaricate, somewhat convex 

 segments ; flowers pedicelled, erect, globe- 

 ovate. 2 f. 



A'RUM. 10—12. {Aroidece.) [From jaron, a 



Hebrew word, sig-nifying a dart, in allusion 



to the shape of the leaves.] 



triphyl"h( ni, (InAian turnip, wild turnip, 

 wakerobin, p. g. and ^^^ M. ll) sub-caules- 

 cent; leaves ternate ; leafets ovate, acumi- 

 nate ; spadix club-form ; spatha ovate, acu- 

 minate, peduncled, with the lamina as long 

 as the spadix. One \a.v\ety,vi'rem, has a 

 green spatha : another, atropurpu' reum, a 

 dark purple spatha: another,aZ"^?<w, awhite 

 spatha. 1-3 f. 



dracon"tium, (Ju. li) slemless; leaves 

 pedate ; leafets lanceolate-oblong, entire ; 

 spadix subulate, longer than the oblong, 

 convolute spatha. Banks of streams. 

 Green-dragon. 



atroru'lens, (brown dragon, M. 2/.) stem- 

 less ; leaves ternate ; leafets ovate, acumi- 

 nate ; spadix cylindrical ; spatha sessile, 

 ovate, acuminate, spreading horizontally 

 above. Spatha dark-brown ; disagreeable 

 smell. 



quina'tum, [li) stemless; leaves quinate, 

 lanceolate, acuminate. i5. 



walle'ri, (Ap.) stemless ; leaves sagittate, 

 triangular, angles divaricate, acute. S. 



ARUN"D0. 3—2. (Graminca.) [Latin, sig- 

 nifying reed.] 



canadeii"sis, (Au. 11) panicle oblong, 

 loose ; glumes scabrous, pubescent, as long 

 as the corolla ; corolla awncd on the back ; 

 hairs at the base equalling the valves ; culm 

 and leaves smooth. 3-4 f. 



phra^mi'tes, (reed-grass, Au. 2^.) spike- 

 lets 3 to 5-flowered ; glumes shorter than 

 the florets ; paleas awnless, the lower lin- 

 ear lanceolate, with a long slender acumi- 

 nation, which is involute and resembles an 

 awn. 



aroi'des, [ll) panicle sub-coarctate, in- 

 curved ; glumes 2-flowered, glabrous, une- 

 qual ; paleas membranaceous, of the length 

 of the glumes; hairs equalling the paleas; 

 leaves flat, scabrous. S. 



AS"ARU\T. 18—12. (Aristolochia;.) [From 

 a, not, sdiro, to adorn, this flower not being 

 admitted into the ancient coronal wreatlis.] 

 canadai'sc, (white snake-root, wild-gin- 

 ger, g-p. M. 11) leaves broad-reniform, in 

 pairs; calyx woolly, deeply 3 parted ; the 

 eegments sub-lanceolate, roflexed. 



arifo'Unw, (Mar. I/.) 'oaves sub-hastate, I 



16 



cordate ; calyx nrceolate, border 3-cleft 

 converging, pubescent within. S. 

 ASCLE'PIAS. 18—5. (A-pocynea.) [Sup 

 posed to have been named in lionor of the 

 founder of medical science, ^sculapius, or, 

 as he is sometimes called in mythology 

 Asclepois.] 



A. Leaves opposite. 



syri'aca, (common milkweed, w-p. Ju. 

 li) stem very simple ; leaves lanceolate' 

 oblong, gradually acute, downy beneath ; 

 umbels sub-nodding, downy, 3 to 5 feet 

 high ; flowers in large close clusters, sweet- 

 scented. 3-5 f. 



incarna'ta, (r. Ju. li) stem erect, branch- 

 ing above, downy ; leaves lanceolate, sub- 

 downy both sides; umbels mostly double 

 at their origin ; the little horn of the nec- 

 tary exsert. A variety, puV'chrn, is more 

 hairy. Var. ^-/a 'ft ra, almost glabrous. Var 

 aZ"ft«,has white flowers. Damp. 3 f. 



ohtusifo'lia, (J. 11) stem single, erect; 

 leaves clasping, oblong-obtuse, undulate on 

 the margin, very smooth, glands beneath ; 

 umbel terminal, long peduncled ; horns of 

 the nectary exsert. Stem 3 f. Leaves 

 much waved on the margin. Flowers 

 large, pale purple. 



phytolac<:oi'des.,{J\i. 11) stem erect, sim- 

 ple ; leaves broad-lanceolate, acuminate, 

 smooth, pale beneath ; umbels many-flow- 

 ered, lateral and terminal, solitary, on 

 long peduncles, nodding ; nectaiy 2-toothed. 

 Wet; rocky grounds. Flowers large, 

 greenish purple, 3 f. 



quadrifo'Ua, (w. p-w. M. 11) stem erect, 

 simple, glabrous ; leaves ovate, acuminate, 

 petioled ; those in the middle of the stem 

 are largest, and m fours ; umbels 2, ter- 

 minal, lax-flowered; pedicels fihform. 

 18 i. Flowers small and sweetscent- 

 ed. 



amac'na, (p. J. 2^.) stem simple, a little 

 hairy on two sides ; leaves sub-sessile, ob- 

 long-oval, pubescent beneath ; terminal 

 umbels and nectaries erect, appendages 

 exsert. Damp. 



purpuras" cens, (p. .Tu. 2^.) stem simple; 

 leaves ovate, villose beneath; umbels erect, 

 horn of the nectaries resupinate. Shades. 

 2f. 



puV'chra, (r. Ju. 11) leaves lanceolate, 

 hairy beneath ; stem divided near tho 

 top ; umbels erect, in pairs ; flowers small ; 

 bark very showy. 



variep;a'ta, (w. Ju. 11) stem simple, 

 erect; leaves ovate, petioled, rugose, na- 

 ked ; umbels sub-sessile, pedicelled, tomen- 

 tose. The umbels dense. 



paivijlo'ra, (w. Ju. 11) smoothish ; stem 

 weak, erect, simple ; leaves petioled, oval- 

 lanceolate, acute at both ends, membrana- 

 ceous ; umbels terminal, lax-flowered ; pe- 

 dicels capillary. The bark a good substi- 

 tute for flax. 1-2 f. 



• B. Leaves not opposite. 



verticilla'ta, (dwarf milkweed, g-y. w. 

 Ju. 11) stem erect, very simple, marked 

 with lines, and small pubescence , leavca 



