CHUOMATISM. 339 



abortive anthers, and the pistil also is in a rudimentary 

 condition. UrnbelUfcrce are not unfrequently subject to 

 this change, e. g .^Torilis Anthriscus^Daucus Carota^Hera- 

 cleum Sj)handylmm, Canim caimif &c. rnmulacece,againf 

 are fi'equently subject to virescence. Among Gompositm 

 the following species are recorded as having had green 

 flowers Girsium tricephalodes, Senecio vulgaHs, Calen- 

 dula officinalis, Pijrethrum Farthenium, Carduus crisjms, 

 Hypocliceris radicata, Hieracium prealtum, Cirsium 

 arvense. Coreopsis Drummondi} In Maminculacece vires- 

 cence has been observed in Delphinium elatmn, crassi- 

 caule and Ajacis, Anemone hortensis and nemm'osa, Aqui- 

 legia vulgaris, Ranunculus Philonotis. 



Many of these cases, and others that might be cited, 

 are probably instances of frondescence or phyllody 

 (see p. 241). 



Chromatism. This term is here intended to apply 

 specially to those cases in which any organ of a plant 

 assumes a colour approximating to that of the petals, 

 or in which the normal green is replaced by tints of 

 some other colour. To a certain extent the change in 

 question is the same as that spoken of under the head 

 of petalody (see p. 283), but there are cases in which, 

 while the ordinary situation and form are those of leaves, 

 the coloration is that of the petals. Such was the case 

 in the Gesnera mentioned by Morren (see p. 88), and in 

 which a leaf occupied the position of an inflorescence, 

 and became brightly coloured. In tulips the presence 

 of a highly coloured leaf on the flower-stalk, below the 

 flower, is not uncommon. So also the bracts or leaves 

 below the perianth in Anemone coronaria and hortensis 

 not unfrequently assume the coloration usually con- 

 fined to the parts of the perianth. A similar illus- 

 tration has presented itself, as this sheet is passing 

 through the press, in which two of the leaflets of the 

 compound leaf of a rose were brightly coloured like 



' See Cramer, ' Bildnngsabweich,' pp. 17, 65, 82, 66. See also Lacas, 

 ' Verhandl. des Bot. Vereins. Brandenb.,' heft 1, 2, Anchvsa. Christ, 

 Flora,' 1867. pp. 376, tab. 5, 6, Stachys. 



