78 ARUM-ASCYRUM. 



absynth"twm, (wormwood, I)..) stem branching, panicled ; leaves hoary; radi- 

 cal ones triply pinuatifid; divisions lanceolate, toothed, obtuse; cauline 

 ones i2-pinnatifid or pinnatifid ; divisions lanceolate, acutish ; florsl ones 

 undivided, lanceolate. Naturalized in most mountain districts of New 

 England. 



abrota'nuni, (southern-wood, %.. and T^.) stem straight ; lower leaves bipin- 

 nate; upper ones hair-form, pinnate ; calyx pubescent, hemispheric. Ex. 



ARUM. 19—12. (Aroidece.) [Fromyarora, a Hebrew word, signifying a dart, in allusion to the 

 shape of the leaves.] 



tripkyl"lum, (Indian turnip, wild turnip, wakerobin, p. g. and w. M. %.) sub 

 caulescent; leaves ternate; leafets ovate, acuminate, spadix club-form; 

 spatha ovate, acuminate, peduncled with the lamina as long as the spadix. 

 One variety, virens, has a green spatha; another, atropurfureum, has & 

 dark purple spatha ; another, album, has a white spatha. 1-3 f 



dracon"tium, (Ju. %.) stemjess ; leaves pedate ; leafets lanceolate-oblong, en- 

 tire ; spadix subulate, longer than the oblong, convolute spatha. Banks of 

 streams. Green dragon. 



quina'tum, stemless ; leaves quinate, lanceolate, acuminate. S. 

 ARUNDO. 3—2. (Graminecn.) [Latin, signifying reed.] 



canaden"sis, {A.\\. '4-) P'l'^ic'e oblong, loose; glumes scabrous, pubescent, £.s 

 long as the corolla; corolla awned on the back; hairs at the base equal- 

 ling (he valves; culm and leaves smooth. 3-4 f. 



ASARUM. 18 — 12. iAristolochia.) [From a, not, sai'ro, to adorn, this flowernot being admitted 

 into tlie ancient, coronal wreaths.] 



canaden'se, (white snake-root, wild-ginger, g-p. M. %..) leaves broad-reniform, 

 in pairs; calyx woolly, deeply 3-parted ; the segments sub-lanceolate, re- 

 flexed. 



ASCLEPIAS. IB— 5. (Apoci/neat.) [Supposed to have been named in honour of the. founder 

 of medical science, ^Esculapius, or as he is sometimes called in mythology, Asclepois.] 



A. Leaves opposite. 



syri'aca, (common milkweed, w-p. Ju. 1+.) stem very simple ; leaves lanceo- 

 late-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. %..) stem erect, branching above, downy ; leaves lanceolate, 

 sub-downy both sides; umbels mostly double at their origin ; the little horn 

 of the nectary exsert. A variety, pulchra, is more hairy. Var. glabra, 

 almost glabrous. Var. alba, has white flowers. Damp. 3 f. 



obtusifo'lia, (J. %.) stem single, erect ; leaves clasping, oblong-obtuse, undu- 

 late on the margin, very smooth glands beneath; umbel terminal, long pe- 

 duncled ; horns of the nectary exsert. Stem 3 f. Leaves much waved on 

 the margin. Flowers large, pale purple. 



phytolaco'idcs, (Ju. %.) stem erect, simple; leaves broad-lanceolate, acuminate, 

 smooth, pale beneath ; umbels many-flowered, lateral and terminal, solita- 

 ry, on long peduncles, nodding ; nectary 2-toothed. Wet, rocky grounds. 

 Flowers large, greenish purple. 3 f. 



quadrifo'lia, (w. p-w. M. '2|- ) stem erect, simple, glabrous ; leaves ovate, acu- 

 minate, petioled ; those in the middle of the stem are largest, and in fours^ 

 umbels 2, terminal, lax-flowered ; pedicels filiform. About 18 inches high- 

 Fowers small and sweet-scented. 



B. Leaves not opposite. 



verticilla'ta, (dwarf milkweed, g-y. w. Ju. %) stem erect, very simple, mark- 

 ed with lines, and small pubescence ; leaves very narrow-linear, straight, 

 glabrous, whorled, scattered ; horn in the nectary exsert. 2 f 



iubero'sa, (Ju. %..) stem erect, hairy, with spreading branches; nectary with- 

 out horns ; leaves oblong-lanceolate, sessile, alternate, somewhat crowded ; 

 umbels numerous, forming terminal corymbs. Sandy fields. Flowers 

 large, bright orange, in numerous, erect umbels. Medicinal. Pleurisy- 

 root, butterfly-weed. 

 ASCYRUM. 12 — 3. {Hyperica.) [From a, without, skuros, roughness.] 



orux-andre'cE, (y. Ju. T^.) stems numerous; sufruticose, terete, with erect 

 branches ; leaves ovate-linear, obtuse ; inner petals sub-orbicular ; pedicels 



