86 CENTATTREA-CHELONE. 



corxife'ra, frond foliaceous, minute ; divisions round, crenate, naked beneath; 

 peduncles long-turbinate, naked, warty-scabrous, pale yellowish, cinereous 

 und green; all bearing cups, which are wine-glass form ; margin extended, 

 fertile ; receptacles rather large, at length roundish, scarlet. 



CENTAUREA. 17—3. (Cinarocephalm.) [From Chiron, the centaur, who is said to have 

 cured a wound in his foot with the plant.l 

 cya'nus, (great blue-bottle, b. w. r. J. ©.) scales of the calyx serrate ; leaves 



linear, entire ; lower ones toothed. Naturalized, 

 america'wa, (great American centaury, ©.) stem branching; leaves sessile, 

 lower ones oblong-ovate ; upper ones lanceolate, acute ; peduncles thick al 

 the apex. 2 f. 

 benedW'ta, (blessed thistle, y. J. ©•) scales of the involucre doubly armed 

 with spikes, woolly, bracted ; leaves decurrent, toothed, spiny. Ex. 



CENTAURELLA. 4—1. {Gentianeea.) 

 panicula'ta, {Sept. ^.) stem branched, smooth; peduncles opposite; leaves 

 minute, subulate ; flowers in panicles. Damp grounds. Flowers small, 

 greenish-white. 4-8 i. 



CEPHALANTIIUS. 4—1. (RubiacecB.) [From kephale, head, anthos, flower.] 

 accidenta'lis, (button bush, w. Ju. T2-) leaves opposite, and in threes, oval, acu- 

 minate. Inflorescence a round head. Swamps. Var. pubcscens, has the 

 leaves and the branchlets pubescent. 4-5 f. 

 CERATIOLA. 20—2. (Suphorbeai.y 

 erico'ides, (Au. T^.) branchlets sub-tomentose; leaves whorled, narrow, linear, 

 smooth. An evergreen shrub. 4-6 f. 

 CBRASTIUM. 10—5. (Caryophi/llem.) [From keras, horn, alluding to the form of its capsule.] 

 vulga'lum, (mouse-ear, chickweed, w. Ap. <v),) hirsute, viscid, cespitose; 

 leaves ovate; petals oblong, about equal to the calyx ; flowers longer than 

 the peduncle. 6-10 i. 

 CERCIS. 10—1. (LeguminoscB.) 

 canuden"sis, (red-bud, judas-tree, r. M. T7.) leaves round heart-form, acumi- 

 nate, villose at the axils of the nerves ; stipules minute • legumes short-sti- 

 ped. Var. pubescens, has roundish, acute leaves, pubesceAt beneath. 15-30 f. 

 CETRARIA. 21-5. (Algce.) [From cetra, a bucl:ler.] 

 island"ica, (the Iceland lichen, Iceland moss,) frond olive-ohestnut-brown, at 

 the base reddish-white, white beneath ; divisions erectish, sub-linear, 

 many-cleft, channelled, tooth ciliate ; the fertile ones dilated ; receptacles 

 close-pressed, flat, 1-coloured ; margin frond-like, elevated, entire. On 

 sandy plains, as on the barren plains, near Beaver-pond, in New Haven. 

 where it covers the earth very densely in many places. 



CHAM^ROPS. 6—3. (Palmm.) [From cAaTOa/, on the ground, o^s, appearing.] 

 serrula'la, (E. Ju. T-j.) caudex creeping; stipes sharply serrate ; fronds plaited, 

 palmate. Fronds 2 f. S. 



OHEIRANTHUS. 14—2. {Cruciferce,.) [From cAeJr, hand, anthos, flower, the blossoms re 

 semble the fingers.] 

 ckei'ri, (wall flower, J. If..) leaves lanceolate, acute, glabrous ; branches ang- 

 led ; stem somewhat of a woody texture. Ex. 

 an"nuus, (stock july-flower, Ju. ©.) leaves lanceolate, sub-dentate, obtuse, 

 hoary ; silique cylindric, with an acute apex. Ex. 



CHELIDONIUM. 12—1. (PapaveracecB.) [From chelidon, a swallow, because it blossoma 

 about the time this bird appears.] 

 ma' jus, (celandine, y. M. %.) umbels axillary, peduncled ; leaves alternate, 

 pinnate, lobed. Naturalized. 

 CHELONE. 13-2. {Bignonim.) [From cAe/one, a tortoise.] 

 gla'bra, (snake-head, w. and r. Ju. 11-.) leaves opposite, lance-oblong, acumi- 

 nate, serrate ; spikes terminal, dense-flowered. Var. alba, leaves sub-ses 

 sile; flowers white. Y a.r . p^irpv/rca, leaves short-petioled ; flowers purple. 

 Var. lanceolata, leaves lanceolate, acuminate, serrate, sessile, pubescent 

 beneath; segments of the calyx oblong. Damp. 



