RAPHANUS— RHAMNUS. 



153 



recui-va'tus, calyx and corolla recurved ; 

 carpels uncinate ; ptcm erect; petioles cov- 

 ered with stiff, spreading hairs. Shady 

 v\'oods. 



fluvia'iilu, (river-crowfoot, w. y. M. 2^.) 

 stem submersed ; leaves dichotomous, cap- 

 illary. 



bulho'sus, (y. M. 11) very hirsute ; leaves 

 ternate, 3 clett, gashed and toothed ; stem 

 erect, many-flowered ; petals obcordate, 

 shorter than the reflexed sepals; root bul- 

 bous. 



perinaylva'mcus, (y. Au. 2X-) stem pilose, 

 srect, branching ; leaves ternate, villose ; 

 segments sub-petiolate, acutely 3-lobed, in- 

 oisely serrate ; calyx reflexed ; petals about 

 equalling the calyx; styles of the fruit 

 straight. 1-2 f 



hirsu'tus, (pale buttercup, y. Ju. 2X-) hir- 

 sute ; leaves ternate ; stem erect, many- 

 flowered ; peduncles sulcatc ; calyx reflex- 

 ed ; fruit globose ; carpels tubercled ; root 

 fibrous. Wet fields. 



clinto'nii, (y. M. 2X-) leaves ternate, 

 hairy; leafets toothed and incised, cuneate, 

 terminal ones pctioled, floral leaves incised 

 or linear; peduncle 1-3 flowered; petals 

 rounded ; calyx spreading ; carpels mar- 

 gined, with a short, uncinate style. 6-8 i. 



lanugino'sus, (y. J. 2X-) hirsute ; leaves 3- 

 jleft, lobed, dentate ; whole plant silky ; ped- 

 mcles elongated, terete ; calyx spreading. 



aqtiafilis, (water crowfoot, w. Ju. Lf.) 

 stem floating ; leaves submersed, divided 

 into capillaceous segments; petals obovate- 

 oblong, longer than the calyx. Var. heter- 

 ophyV'lus, immersed leaves 3-parted. Var. 

 capilla'ceus, leaves petioled, all immersed, 

 and filiformly dissected. Var. cespilo'sits, 

 leaves petioled, all immersed ; base of the 

 petiole broad-sheathing and auricled. Var. 

 st.agna'Uii, leaves .sessile, all immersed, fili- 

 formly dissected, circinate ; segments short ; 

 carpels rather acute, nearly smooth. 



maryland"icns, (w-y. M. 2-f.) pubescent; 

 stem simple, sub-naked ; radical leaves ter- 

 nate ; leafets 3 lobcd ; lobes acute, gashed; 

 calyx reflexed. 



hedeva'ccns, (Ju. 2/.) stem creeping; 

 leaves sub-reniform, about 3-5 lobed ; lobes 

 broad, entire, very obtuse ; petals oblong, 

 scarcely longer than the calyx; stamens 

 5-12 , carpels glabrous. S. 



echina'ius, (y.) simple, rather glabrous ; 

 leaves roundish, 3-Iobed ; petals twice as 

 ong as the calyx. <S. 



k>mento'sns, (y. li.) stem a.scending, very 

 villose, 1-2 flowered ; leaves petioled, to- 

 mcntose, 3cleft, upper ones sessile, ovate, 

 entire ; calyx very villose, sub-reflexed. S. 



carolinia!nns, (y.) stem erect, branched, 

 and with the petioles appressed, pubescent ; 

 leaves glabrous, 3-cleft or 5 lobed ; lobes 

 ovate, somewhat gashed, toothed; calyx 

 glabrous, reflected, a little shorter than the 

 petals, S. 



trachijspc/'mvs, (y. M.) stem, petiole, 

 and leaves, villose, with the hair spreading; 

 leaves 3-cleft; lobes acutely ga.shed ; ped- 

 uncles short, opposite the leaves; carpels 

 tubercled, with the point hooked. 12-151. iS'. 



mnnca'tus, (v. Ap. 0.) leaves petioled, 

 glabrous, roundish, 3 lobed, coarsely tooth- 

 ed ; stem erector diffu.se ; peduncles oppo- 

 site the leaves ; calyx spreading ; carpels 

 rough-tubercled on both sides, with a 

 straight-acuminate point. 12-18 i. S. 



B. Leaves uvdividcd. 



lin"^na, (great spearvvort, y. Au. U.) 



j leaves long, lanceolate, serrate, semi-am 



plexicaulis ; stem erect, smooth, many- 



flowered ; flowers large. Banks of streams. 



2 3 f. 



Jlammu'la, (spearwort, y. Ju.) leaves gla- 

 brous, lance-linear, lower ones petioled; 

 stem decumbent, rooting; peduncles oppo- 

 site the leaves; flowers smaller than the 

 preceding. Swamps. 12-18 i. 



pusiVlus, (y. Ju. li.) erect; leaves peti 

 oled, lower ones ovate, upper ones lance 

 oblong ; petals about as long as the calyx. 

 6-12 i. 



rep" tans, (w-y. Ju. IX) leaves linear-sub- 

 ulate ; stems filiform, creeping, geniculate ; 

 joints 1-flowered. 6-10 i. 



nemoro'sns, produces yellow flowers 

 from May to August. Ex. 



iUyr'tcus, remarkable for its silky, white 

 leaves. Ex. 



plantagin"eus, (Ap. w.) leaves glaucous, 

 lanceolate. 



RAPIIA'NTJS. 14—2. (Cruciferce.) [From 

 radios, root, phainesthai, to grow quickly.] 

 sati'vus, (garden radish, w. J. ^.) leave? 

 lyrate ; silique terete, torose, 2-celled 

 There are several varieties of this species — 

 one has a fusiform, another a globose, an- 

 other a black root. Ex. 



raphams"trum, (wild radish, y. Au.) 

 leaves simple, lyrate ; pod jointed, 1 celled, 

 striate, 3-8 seeded. 1-2 f. Stem hispid. 

 Fields. 



RENSSELAE'RIA. 19—12. (Aroidea.) [In 

 honor of Gen. Stephen Van Rensselaer, of 

 Albany, N. Y.] 



virgiri"ica, (g. J. 11. ) scapes several from 

 one root ; leaves on long petioles, oblong, 

 hastate-cordate, with the lobes obtu.se, a foot 

 or more long ; spatha lanceolate, involute, 

 border undulate, closely embracing the 

 spadix, which is long and slender; berries 

 1-seeded. . 12-18 i. 



RESE'DA. 12—5. {Capparides.) [From re- 

 sedo, to appease, so called from its supposed 

 virtues in allaying inflammation.] 

 odcrra'ia, (mignonette, w-y. Ju. ^.) leaves 

 entire and 3-lobed ; calyx equalling the co- 

 rolla. Ex. 



luteo'la, (dyer's weed, y.) leaves lanceo- 

 late, undulate, entire, each side of the base 

 toothed; calyx 4-cleft; flowers in a spike. 

 Introduced. 



inicran"thus, (y.) hairy ; leaves petiolate, 

 .somewhat rhombic-ovate, crenate, some 

 3-parted or 3-cleft, cauline ones sub-sessile, 

 with 3-5 linear oblong .segments ; sepals 

 with a broad, membranaceous border, aa 

 long as the corolla. Ex. 



RHAM"NUS. 5—1. (RAamm.) [From mxo, 

 to destroy, on account of Hit many lliorus 

 of some of its specie^.' 



