76 



ARE THUSA— ARTEMISIA. 



w. Ju. 0.) Btem dichotonious, spreading; 

 leaves ovate, acute, subciliate ; catj^x acute, 

 sub-striate ; petals shorter than the calyx. 

 5 i. 



stric"ta, (w. M. 11 •) glabrous, erect, many 

 stems ; leaves subulate-linear, erect ; pani- 

 cles fcvv-flowered ; petals much longer than 

 the calvx, which is oval-lanceolate, sti-iate. 

 Dry. 6-li2i. 



pcploi'des, (sea chickweed, Ju. 2^.) glab- 

 rous ; leaves ovute or oblong, acute, fleshy; 

 flowers sub-solitary, short-peduncled ; di- 

 visions of the calyx obtuse, exceeding the 

 coroUa. 8-12 i. Lower Canada. 



"pitchdri [%) erect, slender, glabrous, 

 fastigiately branched, few-flowered ; leaves 

 linear-flliform, obtuse, not fascicled; pe- 

 duncles slightly glandular-pubescent ; pet- 

 als oblong, somewhat exceeding the lan- 

 ceolate, nerved sepals. Texas. Arkan- 

 sas. 

 ARETHU'SA. 18—1. {OrcUdem.) 



bulbo'sa, (arethusa, r. J. 2^.) leafless; 

 root globose ; scape sheathed, 1-flowered ; 

 ca'yxwith the superior divisions incurved, 

 lips sub-crenulate ; flowers large, sweet- 

 scented. Damp. 

 ARGEMO'NE. 12—1. {Papaveracsa.) 



ine.ncana, (y. Ju. @.) leaves piunatifid, 

 spinose, gashed; flowers axillary. Var. 

 alhifiora. S. 

 ARFS"TIDA. 3—2. (Graminea:.) 



dlchofoma, (beard grass, poverty grass, 

 $. 2^.) cespitose ; culm dichotomous; 

 flowers racemose-spiked; lateral awnsveiy 

 short, intermediate ones contorted. 8-12 i. 



spicifor"mix (2/.) flowers crowded to- 

 gether, somewhat spiked ; the middle awn 

 villous at the base. 3 f. S. 



gra'cilis, {24 ■) stem very slender; flow- 

 ers in spikes ; spikelets few-flowered, some- 

 what remote, appressed ; lateral awns 

 short, erect, the intermediate ones longer, 

 expanding. 1 f. S. 



tuber culo'aa, culm erect, dichotomous, 

 joints tamid with small tubercles in 

 the axils; panicles rigid ; glumes keeled, 

 with long subulate points ; paleas stiped ; 

 awns smooth, convolute. 3 f. S. 



ARISTOLO'CHIA. 18-6. (Aristolochiw.) 



ser-penta'ria, (p. J. ll) leaves heart-form, 

 oblong, acuminate ; stem zigzag, ascending ; 

 pediyicles radical ; lips of the corolla lan- 

 ceolate. Virginia snake-root. A variety 

 has very long, narrow leaves. 



si'pho, (Dutchman's pipe, J. 1?) leaves 

 heart-form, acute ; stem twining ; pedun- 

 cles 1-flowered. furnished with an ovate 

 bract; corolla ascending, the border 3-cleft, 

 equal. A vine climbing over large trees. 

 Flowers solitary, brown. 



tomento'sa, (g-y.) stem twining ; leaves 

 nearly round, cordate, tomentose under- 

 neath; coi-oUa villous ; border 3-cleft, nearly 

 equal. 8. 



hasla'ta, stem fluxuose, simple, erect ; 

 leaves somewhat cordate, hastate, acute ; 

 flowers on scapes • lip of the corolla ovate. 8. 



aRMENIA'CA. 11—1. (Rosacea.) [From 

 Armenia.] 



I vulgafris, (apricot, '^).) leaves sub-cor- 

 date ; stipules palmate. Var. jtwe'coa', early 

 ' apricot. Fruit small, yellow. Var. persi- 

 I coi'des, peach apricot. * Fruit sub-coni 

 pressed. 

 ARNI'CA. 17—2. (Corymhifcrm.) 



nudicau'lis, (y. J. Ju. 2/.) hirsute ; radi 

 cal leaves opposite, decussate, broad-lance- 

 olate, nerved, and toothed ; stem nearly 

 leafless, divided near the summit into a few 

 1-flowered branches. Flowers large. 2-3 

 f. Pine barrens. Leopard's bane. 



plantagin" ca, (y. Ju. 2^.) glabrous, 

 leaves entire, glabrous botli sides, acute, 

 3-nerved ; radical ones lance-spatulate, ter- 

 minating in a narrow petiole at the base ; 

 cauline ones opposite, lanceolate, sessile ; 

 stem 1-flowered. 7 i. 



Jul" gens, (y. Ju. 2^.) hairy; radical leaves 

 lanceolate, obtusish, tapering to the base ; 

 petioles 3-nerved ; cauline leaves opposite, 

 remote, linear ; stem 1-flowered. If. S. 



clay'toni, (y. Ju. ^ .) hirsute ; radical 

 leaves decussately opposite, oblong ovate, 

 sub-dentate ; stem somewhat leafless ; top 

 divided into 1-flowered peduncles. 2 f. 

 S. 



ARO'NIA. 11—5. {Rosacea.) [A Greekword, 



signifying the medlar-tree.] 



hotrya'pium, (shad-bush, june-berry, w. 

 Ap. li) leaves oblong-oval, cuspidate, glab- 

 rous v^hen mature, (when first expanded 

 lanceolate and dov^^ny) ; flowers racemed ; 

 petals linear ; germs pubescent ; segments 

 of the calyx glabrous. 



arbutifc/lia, (M. ^ .) unarmed ; leaves 

 ovate-oblong, acute, serrulate, tomentose 

 beneath; flowers in corymbs; calyx tom- 

 mentose. Low thickets. 2-4 f. Redcboke- 

 berry. 



ova'lis, leaves roundish-elliptical, ovate, 

 smooth ; flowers in racemes ; petals obo- 

 vate ; germs and segments of the calyx 

 pubescent. Swamps. A small shrub ; ber- 

 ries black and eatable. Medlar-busli. 



sangxdnl'ea, (bloody choke-berry, w. M- 

 1?.) leaves oval, obtuse at both ends, mu- 

 cronate, serratures very slender; racemes 

 few-flowered; calyx glabrous; petals lin- 

 ear, obtuse. 3-6 f. 



alnifo'lia, ( ^ .) smooth ; leaves roundish, 

 upper part toothed, pinnately-nerved, sub- 

 glaucous beneath; raceme simple, elon- 

 gated. Fruit black and sweet. <S'. 

 ARTEMFSIA.* 17—2. (Corymliferw.) [From 



an ancient queen.] 



pon"tka, (Roman artemisia.) leaves 

 downy beneath, cauline ones bipinnate ; 

 Icafets linear ; branches simple ; flowers 

 roundish, peduncled, nodding. Ex. 



abs>nt}i"ium, (wormwood, 2X-) stem 

 branching, panicled ; leaves hoary, radical 

 ones triply pinnatiKd, divisions lanceolate, 

 toothed, obtu.se; cauline ones 2-pinnatifld or 

 piunatifid, divisions lanceolate, acutish 

 floral ones undivided, lanceolate. Nato 

 ralized in most mountain districts of New 

 England. 



* The cultivated plant often called Arte 

 misia, belongs to the genus Chrysanthemum 



