CERINTHE 



CEROPTERIS 



725 



the tube. About 6 species. The best species is C. 

 retorta, which has a unique appearance in the garden, 

 and is strongly recommended for more general cult. 

 It is a hardy annual of easy cult. 



retorta, Sibth. & Smith. MONEYWORT. Fig. 885. 

 Height 1 l /2-2 ft. : Ivs. glaucous, often spotted white or 

 red; lower Ivs. obovate-spatulate; upper Ivs. amplexi- 

 caul, with 2 round ears, on the flowering branches gradu- 

 ally becoming smaller and closer together until they 

 pass into purple bracts, which form the chief attractive 

 feature of the plant: fls. when full-blown protruded 

 beyond the bracts; corolla tubular-club-shaped, yellow, 

 tipped purple, with 5 small, spreading teeth: frs. smooth 

 but not shining. Greece. B.M. 5264. Gn. 41:212. 

 For a garden review of the other honeyworts, see 

 Gn. 41, p. 212. 



C. major, Linn. A showy annual 6-15 in. high: Ivs. clasping the 

 St., very rough and ciliate: fls. with showy bracts; the corolla yellow 

 below, purplish at the top: fr. smooth, shining and brown-spotted. 

 Medit. region. B.M. 333. WlLHELM MlLLER. 



N. TAYLOR.f 



CEROPEGIA (Greek, wax and fountain, the flowers 

 having a waxy look). Asclepiadacese. Greenhouse 

 vines of Africa and Asia. 



Stems fleshy, erect and twining among the other 

 plants in nature, or pendulous: Ivs. opposite, sometimes 

 in the S. African species wanting: fls. medium-sized, the 

 corolla more or less inflated at the base, straight or 

 curved; corona something as in our common milk- 

 weeds, double. A genus of 100 species, a dozen of 

 which are known in Old World collections but only the 

 following in Amer. Many of them have tuberous roots, 

 and need a season of rest and dryness. May be grown 

 in a compost of loam, leaf-mold or peat, and sand. 

 Temperate house is the best for the two following. 

 Prop, by cuttings in spring over bottom heat. Odd and 

 handsome. 



Wo6dii, Schlecht. With many slender prostrate or 

 trailing sts.: Ivs. fleshy, about \% in. long, almost 

 rotund: fls. in pairs, axillary on stalks, 3-7 in. long; 

 corolla slightly curved, about %'m. long, pink or with 

 dark lines below, the upper part sometimes purplish. 

 Natal. G.C. III. 22:357; 37:244 (desc.). B.M. 7704. 



Sandersonii, Decne. St. twining, fleshy and thick: 

 Ivs. about 1% in. long, ovate-lanceolate: fls. cymose, 3-4 

 at a node, the greenish white corolla about lJ^-2 in. 

 long, curved and with an obvious inflation at the base. 

 Natal. B.M. 5792. G.C. 111.40:383. R.H. 1901, p. 

 111. 



C. barbertonensis, N. E. Br. Lvs. somewhat variegated with pale 

 green along the veins: fls. similar to C. Woodii. Transvaal. C. 

 Brdwnii, Ledger. Corolla-tube pale green with dark blotches; lobes 

 greenish witha'zoneof white and dark purple in the middle. Uganda. 

 C. discreta, N. E. Br. Tuberous: tube whitish, dark-veined; lobes 

 pale yellow at base, purple-green at apex. Madras. C. fusca,C. Bolle. 

 Many succulent sts.: corolla dull reddish brown: coronna light yel- 

 low. Canary Isls. B.M. 8066. C. gemmffera, K. Schum. A tall 

 climbing species: fls. solitary. W. Trop. Afr. C. Lugdrdx, N.E.Br. 

 Lvs. thin, 1-2 in. long: tube 1 in. long, abruptly curved immediately 

 above inflated base, dilated at apex into funnel-shaped mouth. 

 Bechuanaland. G.C. III. 30:302 (desc.). C. Rendallii, N.E. Br. A 

 small species with fl. having an umbrella-like canopy surmounting 

 the corolla: twining. Transvaal. C. slmilis, N.E. Br. In cult, as 

 C. Thwaitesii. Corolla-lobes white or pale green at base, ciliate. 

 G.C. III. 40:384. C. Thorncroftii, N. Br. Sts. twining: cymes 

 axillary, many-fld.; corolla white, with purple blotches. Trans- 

 vaal. B.M. 8458. N> TAYLOR> 



CEROPTERIS (Greek, wax fern). Polypodiacese. Hot- 

 house ferns of rather small size, interesting for the 

 powdery covering on the leaves. 



A rather small group somewhat related to Pteris, 

 characterized most conspicuously by having the under 

 surface of the Ivs. covered with a colored powder, often 

 silver, white or bright yellow (so-called silver and 

 gold ferns). The sporangia are borne in indefinite 

 lines and are unprotected by any indusium. The spe- 

 ies of Ceropteris have in the past been classified under 

 the generic name Gymnogramma, but fern students 



are now generally agreed in separating it as a distinct 

 genus. 



INDEX. 



argentea, 4. 

 argyrophylla, 7. 

 calomelanos, 6. 

 chrysophylla, 2, 6. 

 decomposita, 5. 



gigantea, 2. 

 Laucheana, 2. 

 magnified, 6. 

 peruviana, 7. 

 pulchella, 9. 



sulphurea, 3. 

 tartarea, 8. 

 triangularis, 1. 

 viscosa, 1. 



Wettenhal liana, 



886. Ceropteris triangularis. 



A. Powder commonly yellow: Ivs. about as broad as long. 



1. triangularis, Underw. (Gymnogrdmma triangula- 

 ris, Kaulf.). Fig. 886. Lf. -blades 2-5 in. wide and 

 long, on stalks 6-12 in. long, 



dark green above, below deep 

 golden yellow, or occasion- 

 ally white; lower pinnae much 

 larger than the others, del- 

 toid; the upper lanceolate. 

 Calif, to Brit. Col. Gn. 48, 

 p. 444. A white - powdered 

 variety with a viscous upper 

 surface and coarser cuttings 

 (var. viscdsa, D. C. Eaton) 

 is found in S. Calif. 



AA. Powder yellow: Ivs. lanceo- 

 late, several times as long 

 as broad. 



B. Lvs. scarcely more than 

 bipinnate. 



2. chrysophylla, Link 

 (Gymnogrdmma chrysophylla, 

 Kaulf.). Lvs. 12-18 in. long, 

 with blackish stalks and 

 rachises, the segms. slightly 



pinnatifid at the base: powder golden yellow. W. 

 Indies to Brazil. R.H. 1856:201. G.C. III. 23:373 

 Often considered a var. of C. calomelanos. Var. 

 Laucheana (Gymnogrdmma Laucheana, Hort.), has tri- 

 angular Ivs. except in its sub-variety gigantea. Gn. 48, 

 p. 437. 



BB. Li's, tripinnatifid to quadripinnate. 



3. sulphurea, Fee (Gymnogrdmma sulphurea, Desv.). 

 Lf.-blades 6-12 in. long on chestnut-brown stalks, the 

 pinnae long, tapering, less than 1^ in. wide at base, the 

 pinnules compact, with 3-7 divisions: powder sulfur- 

 yellow. W. Indies. 



4. argentea, Kuhn (Gymnogrdmma aiirea, Desv.). 

 Lvs. 6-12 in. long, 7-10 in. wide, deltoid; pinnae del- 

 toid, 2-3 in. wide at base, the ultimate divisions cu- 

 neate. Madagascar. By some this is referred to Gym- 

 nogrdmma argentea, Mett., a similar fern with white 

 powder. 



5. decomposita, Baker (known only under the 

 name Gymnogrdmma decompdsita, belongs in Cerop- 

 teris). Lvs. l^ft. long, 1 ft. broad, deltoid, quadripin- 

 nate or even 5-pinnate; pinnae close, lanceolate, with 

 the ultimate divisions linear and 1 -nerved: powder 

 rather scanty. Andes. F.R. 2:25. G.C. III. 11:365. 

 F. 1874, p. 148. 



AAA. Powder white: Ivs. lanceolate. 

 B. Segms. acute. 



6. calomelanos, Underw. (Gymnogrdmma calomela- 

 nos, Kaulf.). Fig. 887. Stalks and rachises nearly 

 black: Ivs. 1-3 ft. long, with lanceolate pinnae; segms. 

 often with a large lobe-like auricle at the upper side of 

 the base. W. Indies to Brazil. A.G. 14:303. The 

 most variable species of the genus. C. magnifica, Hort., 

 is probably one of the many garden varieties. Var. 

 chrysophylla, is here considered a distinct species. (See 

 No. 2.) 



BB. Segms. obtuse, rounded. 



7. peruviana, Link (Gymnogrdmma peruviana, 

 Desv.). Lvs. 6-12 in. long, 3-5 in. wide, with dark 



