_Byssaceous_, composed of fine flax-like threads. _Caducous_, dropping off very early, compared with other parts; as the calyx in the Poppy, falling when the flower opens. _Cæruleous_, blue. _Cærulescent_, becoming bluish. _Cæspitose_, or _Cespitose_, growing in turf-like patches or tufts. _Calathiform_, cup-shaped. _Calcarate_, furnished with a spur (_calcar_), 86, 87. _Calceolate_ or _Calceiform_, slipper-shaped, like one petal of the Lady's Slipper. _Callose_, hardened; or furnished with callosities or thickened spots. _Calvous_, bald or naked of hairs. _Calyciflorus_, when petals and stamens are adnate to calyx. _Calycine_, belonging to the calyx. _Calyculate_, furnished with an outer accessory calyx (_calyculus_) or set of bracts looking like a calyx, as in true Pinks. _Calyptra_, the hood or veil of the capsule of a Moss, 163. _Calyptrate_, having a calyptra. _Calyptriform_, shaped like a calyptra or candle-extinguisher. _Calyx_, the outer set of the floral envelopes or leaves of the flower, 14, 79. _Cambium_, _Cambium-layer_, 140. _Campanulate_, bell-shaped, 90. _Campylotropous_, or _Campylotropal_, curved ovules and seeds, 111. _Campylospermous_, applied to fruits of Umbelliferæ when the seed is curved in at the edges, forming a groove down the inner face; as in Sweet Cicely. _Canaliculate_, channelled, or with a deep longitudinal groove. _Cancellate_, latticed, resembling lattice-work. _Candidus_, Latin for pure white. _Canescent_, grayish-white; hoary, usually because the surface is covered with fine white hairs. _Incanous_ is whiter still. _Canous_, whitened with pubescence; see _incanous_. _Capillaceous_, _Capillary_, hair-like in shape; as fine as hair or slender bristles. _Capitate_, having a globular apex, like the head on a pin. _Capitellate_, diminutive of capitate. _Capitulum_, a close rounded dense cluster or _head_ of sessile flowers, 74. _Capreolate_, bearing tendrils (from _capreolus_, a tendril). _Capsule_, a dry dehiscent seed-vessel of a compound pistil, 122. _Capsular_, relating to, or like a capsule. _Capture of insects_, 154. _Carina_, a keel; the two anterior petals of a papilionaceous flower, 92. _Carinate_, keeled, furnished with a sharp ridge or projection on the lower side. _Cariopsis_, or _Caryopsis_, the one-seeded fruit or grain of Grasses, 121. _Carneous_, flesh-colored; pale red. _Carnose_, fleshy in texture. _Carpel_, or _Carpidium_, a simple pistil or a pistil-leaf, 106. _Carpellary_, pertaining to a carpel. _Carpology_, that department of botany which relates to fruits. _Carpophore_, the stalk or support of a pistil extending between its carpels, 113. _Carpos_, Greek for fruit. _Cartilaginous_, or _Cartilagineous_, firm and tough in texture, like cartilage. _Caruncle_, an excrescence at the scar of some seeds, 126. _Carunculate_, furnished with a caruncle. _Caryophyllaceous_, pink-like: applied to a corolla of 5 long-clawed petals.