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MEMOIRS OF THE NEW YORK BOTANICAL GARDEN [ Vol. 8, No. 1 



Leaf-blades lanceolate-oblong, 5-7 x 1—2 cm., obscurely pinriatinerved, 

 soft-pilose beneath; pedicels, calyx-tube, and corolla densely 

 pale-pilose; calyx-tube winged. C. lanceolatum Benth. 



Leaf-blades elliptic or ovate-elliptic (rarely lanceolate), 6-12 x 2-8 

 cm., essentially glabrous, the secondary nerves ascending from or 

 nearly from base; flowers glabrescent at or soon after anthesis. 

 Calyx 30—45 mm. long, the tube conspicuously 5-winged. 



C. reginaldii A. C. Smith, comb. nov. 

 Calyx 20-28 cm. long, the tube regularly 10-costate. 



C. alberti-smithii (Sleumer) Sleumer. 

 Calyx-limb comparatively inconspicuous, the lobes deltoid, ovate, or merely 

 apiculate, not more than 7 mm. long at anthesis. 

 Sinuses of calyx-limb usually acute or obtuse, the lobes obvious, 1-7 mm. 

 long. 



Leaf-blades conspicuously cordate and amplexicaul at base. 



Calyx-tube 10-costate; corolla 25-30 mm. long; leaf-blades up to 7.5 

 X 4.5 cm.; branchlets and young leaves soft-pilose. 



C. amplexicaule A. C. Smith. 

 Calyx-tube terete; corolla 33-35 mm. long; leaf-blades up to 13.5 X 7 



cm.; branchlets and leaves glabrous. C. silvicola A. C. Smith. 



Leaf-blades acute to rounded or faintly cordate at base, not amplexicaul. 

 Corolla 15-20 mm. long; calyx continuous with pedicel (or the articu- 

 lation very obscure); leaf-blades usually lanceolate-elliptic, 

 rarely more than 3.5 cm. broad. C. lorctnthiflorum Benth. 



Corolla at least 35 mm. long; calyx obviously articulate with pedicel. 

 Leaf-blades 6-12 cm. long, the principal nerves sharply ascending 

 from or nearly from base. 

 Calyx-tube longitudinally furrowed, the lobes about 6 mm. long; 

 corolla about 6 mm. in diameter near base; filaments about 

 3 mm. long. C. calycinum (A. C. Smith) Sleumer. 



Calyx-tube smooth, the lobes 2-3.5 mm. long; corolla strongly 

 ventricose, 8-17 mm. in diameter near base; filaments about 

 5 mm. long. C. ventricosum A. C. Smith, sp. nov. 



Leaf-blades 2-6 cm. long, pinnatinerved. 



Leaf-blades serrate or at least crenulate at the usually strongly 

 recurved margin; calyx-tube narrowly winged, the limb scarce- 

 ly 2 mm. long including the lobes. C alatum (Hoer.) Sleumer. 

 Leaf-blades entire at margin; calyx-lobes 5-7 mm. long. 



Calyx-tube and corolla essentially terete, the calyx-lobes with 

 marginal glands; corolla essentially glabrous; filaments 

 firmly connate, the tubules 3-4 times as long as the thecae. 



C. nubigenum A. C. Smith, comb. nov. 

 Calyx-tube and corolla 5-angled, the calyx-lobes eglandular; 

 corolla villose; filaments free, the tubules 2-3 times as 

 long as the thecae. C. campii A. C. Smith, sp. nov. 



Sinuses of calyx-limb flattened, the teeth minute, apiculate, scarcely 1 

 iffm. long. 



Calyx-tube 5-winged; corolla about 30 mm. long, essentially hypocrateri- 

 form, the limb flaring, with lobes 7-8 mm. broad at base; leaf-blades 

 pinnatinerved, with 4-6 secondaries per side. 



C. charianthum A. C. Smith. 

 Calyx-tube not winged; corolla 45-53 mm. long, subcylindric, the lobes 

 about 3 mm. broad at base; leaf-blades 5- or 7-nerved from or nearly 

 from base. . C. prietoi A. C. Smith, sp. nov. 



Ceratostema pensile (A. C. Smith) A. C. Smith, comb. nov. 



Periclesia pensilis A. C. Smith, Contr. U. S. Nat. Herb. 29: 364. 1950. 



As mentioned in the above discussion, the connate filaments hardly serve to 

 keep Periclesia apart from Ceratostema. In its more fund amental characteristics 

 the present species seems closest to C. peruvianum, differing in its glandular-pilose 

 inflorescence with large bracts and bracteoles, as well as in its essentially glabrous 

 leaves. Thus far C. pensile is known only from the type collection, Steyermark 53798. 



