806 



CLYTOSTOMA 



COB^A 



the ovules in 2 rows: caps, compressed, prickly, sep- 

 ticid, with numerous nearly orbicular winged seeds. 

 About 8 species in S. Amer., usually described under 

 Bignonia in horticultural writings. Closely related to 

 Bignonia, from which it differs chiefly in its simple 



1005. Cnicus 



benedictus. 



slender tendrils, the short disk, the small or subulate 

 calyx-teeth and the prickly pod. Suited for cult, in 

 subtropical or tropical regions only, or as a stove plant 

 in the N. For cult, and prop., see Bignonia. 



callistegioides, Bur. & Schum. (Bignonia callisteg- 

 ioldes, Cham. B. specidsa, Graham. B. picta, Lindl. 

 B. LAndleyi, DC.). Large climber: Ifts. elliptic-oblong, 

 acuminate, undulate, glabrous, lustrous, reticulate 

 below, about 3 in. long: fls. on 2-fld. terminal peduncles; 

 calyx campanulate, with subulate teeth; corolla pale 

 purple, streaked, about 3 in. long, the tube yellowish 

 streaked purplish, limb 2-3 in. broad, with the lobes 

 spreading, broadly oval, obtuse and wavy ; disk crenate. 

 Spring and early summer. S. Brazil, Argentina. B.M. 

 3888. B.R. 28:45. H.U. 3:227. P.M. 10:125. F.S. 

 9:907. Will stand a little frost, when grown in the 

 open in the S. 



purpftreum, Rehd. (Bigndnia purpurea, Lodd.). Large 

 climber: Ifts. sometimes 3, ovate-oblong or obovate- 

 oblong, short-acuminate, bright green above, paler 

 below, entire, occasionally toothed, about 3 in. long: fls. 

 on axillary 2-fld. peduncles or sometimes in clusters; 

 calyx tubular-campanulate, with short triangular teeth; 

 corolla mauve-colored with white eye, with a rather 

 slender tube 1 in. long, lobes spreading, orbicular-obo- 

 vate. Uruguay. B.M. 5800. G.C. III. 24:399. 



ALFRED REHDER. 



CNlCUS (Latin name of SafHower, early applied to 

 thistles). Composite. BLESSED THISTLE. A monotypic 

 genus allied to Centaurea, and distinguished from it 

 botanically by its heads being quite sessile and sur- 

 rounded just below by bristly leaves. Its habit in 

 the garden is very different from the bachelor's but- 

 ton, being thistle - like, and more interesting than 

 ornamental. A hardy annual low-growing herb, rough, 

 branching and pilose. Once thought to counteract poison. 

 Culture easy. Fit for wild gardens and rockeries. 



benedictus, (Linn. Cdrduus benedictus, Authors. Cen- 

 taurea benedida, Linn. Carbenia benedicta, Adans.). 



Fig. 1005. Height 2 ft.: Ivs. alternate, sinuate-pinnati- 

 fid, oblong, the lobes and teeth spiny: heads terminal, 

 yellow, 1 in. wide, the fls. exclusively tubular. Medit. 

 regions and Caucasus. Sometimes cult.; also seen in 

 waste places of S. Atlantic states and Calif, as a weed 

 adventive from Eu. 



C. rhaphilepis, Hemsl., S. Mex., has recently been cult, abroad. 

 It is described as a handsome plant with deeply cut spiny-toothed 

 Ivs. about 2 ft. long, gray-tomentose beneath: st. colored, much 

 branched: fl.-heads 3-3 J^ in. long, the involucral bracts scarlet 

 and spine-tipped; fls. scarcely exserted, the filaments carmine. 

 Under the above definition of Cnicus, this plant must fall in another 

 genus. It has been placed in Carduus by E. L. Greene, as C. 



raphilepis - N. TAYLOR, f 



COBJJA (after Father Cobo, Spanish Jesuit of the 

 seventeenth century, naturalist, and resident of America 

 for many years). Syn. Rosenbergia. Sometimes incor- 

 rectly spelled Cobcea. Polemoniacese. Attractive climb- 

 ers, one or two species commonly grown in the open 

 and under glass for the large bell-shaped flowers. 



Shrubby plants climbing by If.-tendrils, but known 

 in cult, as herbs: Ivs. alternate, pinnate: calyx large, 

 5-parted; corolla bell-shaped, the limb 5-lobed: caps. 

 3-valved, angled: fls. solitary on long peduncles, 

 bracted at the base. A genus of about 10 Trop. Ameri- 

 can climbers (monographed by Brand 4 in Engler's 

 Pflanzenreich, nft. 27, 1907), of which C.' scandens, a 

 tender perennial plant, is amongst the dozen most 

 popular vines commonly treated as annuals. This is 

 the only genus of climbers in the order. Prop, by seeds 

 which should be placed in moist earth, edge down. It is 

 a rapid grower. 



scandens, Cav. (Rosenbergia scandens, House). 

 Figs. 1006-1008. Height 10-20 ft.: Ifts. in 2 or 3 pairs, 

 the lowest close to the st., and more or less eared: fls. 

 bell-shaped, 1-1 J^ in. across, light violet or greenish 

 purple, with protruding style and stamens: tendrils 





1006. Cobsea scandens. ( X K) 



