-I * 



Cfjc Erca£urp of 23otanu. 



[CHRY 



base of tlie stem, woolly ; inflorescence 

 cymose, lax, or contracted into heads ; 

 involucres one-flowered, tubular, three- 

 sided, six-toothed : perianth herbaceous, 

 tubular, with a six-lobed limb, the lobes in 

 two rows ; stamens nine, the filaments co- 

 hering at the base ; styles three ; fruit a 

 three-sided nut. [J. T. S.] 



CHORIZOPTERIS. A name * proposed 

 for one or two Acrostichoid ferns, now 

 classed with NewroeaUis, which are re- 

 markable in having the parts of the 

 j fronds articulated, so that they readily 

 | fall to pieces when dry. [T. MJ 



CHOROZEMA. A genus of pretty West 

 Australian bushes belonging to the pea- 

 flowered Leguminosce. It is nearly allied 

 to Callistachys, but differs in having the 

 keeled petal shorter than the wings, as 

 well as in the inside of the pod being des- 

 titute of any pithy substance. The plants 

 are very often to be met with in green- 

 houses, upwards of a dozen species being 

 | in cultivation, the greater portion of them 

 I producing their graceful elegant flowers 

 in the spring months. The leaves are sim- 

 J pie, either entire or with spinous teeth, 

 ' generally smooth, and varying much in 

 i form. In the greater portion the flowers 

 ! are in racemes, but in a few they are axil- 

 ; lary and solitary; the pods are generally 

 I oval in form, turgid, and about half an 

 ! inch long, containing a number of seeds. 



The first species of the genus, C. ilici- 

 : folium, was found by Labillardiere in West 

 ; Australia. This botanist was attached to 

 ! the expedition sent by the French govern- 

 I inent in search of the lost La Perouse, and 

 : onone of his excursions suffered much.wir.h 

 his party, for want of water ; at last they 

 i met with an ample supply, and near it with 

 1 this plant, which he named Chorozema, a 

 ! name said to be derived from choris a 

 \ dance, and zema a drink, in allusion to the 

 . joyful feelings of the party on meeting 

 : with a supply of water. 



Amongst the most beautiful of the Cho- 

 j rozermas known in cultivation are: — C. 

 Henchmanni,vrith long terminal leafy ra- 

 ! cemes, of a beautiful red colour, the 

 I standard having a green spot at its base ; 

 ! the leaves are awl-shaped, about half an 

 | inch long, and generally disposed in 

 j clusters of three. C. spectabile, a twiner 

 j of great beauty, producing long drooping 

 i racemes of orange-coloured flowers, which 

 ! appear in the winter months; its leaves 

 j are oblong-lanceolate, with a little point 

 I at the apex. C. cordatum, a plant very 

 | common in gardens, and having ovate 

 ! short-stalked leaves, heart-shaped at the 

 i base, the margins armed with prickly 

 teeth ; the flowers, in loose racemes, are 

 red, the standard spotted with yellow at 

 the base. C. Dicksoni, a handsome plant 

 with larger flowers than the others ; the 

 leaves are entire and lance-shaped, gener- 

 ally having on both surfaces a few long- 

 spreading hairs. There are upwards of 

 twenty species known. [A. A. B.] 



CHOU- (Fr/) Brassica. — , CARAIBE 



Oihidiinn so o it t<v folium, and Colocosia 

 esculenta. — DE CHIEN. Mercicricdis 

 perennis. — FLEUR. Brassica oleracea 

 botrytis. — , MARIN. Crambe maritima 

 — , PALMISTE. Areca oleracea. 



CHRISTISONIA. A genus of Oroban- 

 chacece containing ten or twelve species, 

 natives of India. They are parasitic plants, 

 with fleshy steins, scattered or imbricated 

 scaly leaves, and the flowers terminal or in 

 the axils of the upper leaves ; the calyx 

 is tubular and five-toothed ; the corolla 

 infundibuliform and somewhat two-lipped; 

 the anthers two-celled, with one of the 

 cells barren and subulate ; and the ovary 

 imperfectly two-celled, the inflexed septa 

 only partially meeting in the axis, and the 

 placentiferous margins remaining free, 

 and being reflexed form two loose placentte 

 in each cell [W. C] 



CHRISTMAS ROSE. Helleborus niger. 

 CHRISTOPHER, HERB. Actcea spicata ; 

 also Osmunda regalis. 

 CHRIST'S EYE. Inula cuius Christi. 

 CHRIST'S THORN. Paliurus aculeatus. 



CHRISTYA. A Cape shrub forming a 

 genus of Apocynacea, and having erect 

 rod-like branches and large handsome 

 flowers, with a calyx divided into five 

 lance-shaped divisions, each with a cleft 

 gland at its base ; a somewhat bell-shaped 

 corolla with a row of cleft fleshy scales at 

 its mouth, alternating with the linear 

 divisions of its limb ; five anthers, hairy 

 oil their back, and cohering with the 

 velvety cushion-like stigma. The two ova- 

 ries contain several seeds. [M. T. M.j 



CHROMATIDIUM. The colouring matter 

 of plants. 



CHROMISM. Preternatural colouring 

 of plants, as that of leaves when they 

 become red, &c. 



CHROMULE. The fluid colouring matter 

 of vegetation. 



CHROOLEPUS. A curious genus of 

 Algce, referred to the green-spored division 

 oil account of its clear natural affinities, 

 but exhibiting, when fresh, orange not 

 green tints. The species grow on damp 

 walls, rocks, evergreen leaves, bark, &c, 

 and when fresh often emit a scent like that 

 of violets. The minute zoospores are con- 

 tained in lateral cysts, and by these the 

 genus is at once distinguished from Calli- 

 thamnion, which in some respects it re- 

 sembles. The black productions, commonly 

 referred to this genus are evidently fungi 

 and not algas. Chroolepus sometimes oc- 

 curs in a rudimentary state on exposed 

 stones, and then obtains the name of the 

 sweet-scented Byssus. [M. J. B.] 



CHRYSALOIDEUS. Rolled up and 

 folded up at the same time. 



CHRYSANTHE^ME DES INDES OTJ 

 POMPON. Pyrethrum indicum. 



CHRYSANTHEMUM. A genus of her- 



