140 



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



Racemes distinctly peduncled; leaves lanceolate to subrotund, glabrous to 

 pilosulous above, glabrous beneath; flowers usually distinctly 

 pediceled. 



Leaves very unequal in each pair, the smaller soon deciduous, the larger 



subsessile; flowers sessile or subsessile. /VI. gesneriaceum Sandw. 



Leaves essentially equal in most pairs, all distinctly petioled; flowers 

 distinctly pediceled in the raceme. 

 Leaves blunt to rounded at both ends. 



Stem and petioles beset with minute reddish glands; sepals acumi- 

 nate; flowers 5-merous; spur of the anther blunt, less than half 

 as long as the thecae. rti. glandulosum Gl. 



Stem and petioles glandless; sepals broadly triangular; flowers 4- 



merous; spur very slender, nearly as long as the thecae. M. monlanum Gl. 

 Leaves acute to acuminate, at base cuneate to subcordate; sepals 

 wider than long. 

 Flowers 4-merous; lateral veins not naked at base. 



Leaves rounded or subcordate at base; petals about a fourth as 

 wide as long; hypanthium and sepals together about 4 mm. 

 long at anthesis. M. fruticosum Gl. 



Leaves narrowly to broadly cuneate at base; petals nearly half as 

 wide as long; hypanthium and sepals 2-2.5 mm. long at 

 anthesis. M, cristatum (DC.) Triana. 



Flowers 5-merous; lateral primary veins naked at base. 



M. fasaculatum (DC.) Triana. 



Diolena longidens Gl. sp. nov. 



Suffrutex ramosus; folia valde dimorpha, majora ovato-oblonga supra medium 

 pectinato-dentata, minora elliptica integra; flores 5-meri solitarii, breviter pedun- 

 culati; sepala fere semicircularia erosa, dentibus exterioribus subulatis multo 

 breviora; D. repenti Gl. habitu valde affinis, differt dentibus exterioribus elonga- 

 tis et ovario fimbriato. 



Stems suffruticose, much branched, 1-3 dm. tall, glabrous, when young 

 strongly flattened and narrowly 2-winged, becoming thickened and sharply 



4- angled; internodes 5-10 mm. long. Leaves very dimorphic: the larger ovate- 

 oblong, 12-17 mm. long, 7-9 mm. wide, obtuse, broadly acute at base, entire in 

 the basal half, above the middle pectinate-dentate with strongly ascending teeth, 

 glabrous except a few scattered brown scales on the lower side, 3-nerved, on 

 petioles 1.5-2 mm. long; the smaller leaves essentially sessile, elliptic, 4-5 

 mm. long, abruptly acuminate, entire, 1-nerved. Peduncles solitary in the up- 

 per axils, 6-7 mm. long, subtended at base by a pair of reduced leaves, densely 

 scabrously pubescent with stout curved-ascending hairs. Flowers solitary, 



5- merous. Hypanthium cup-shaped, thin-walled, 2.8 mm. long, scabrous like the 

 peduncle. Calyx-tube about 1 mm. long; sepals very thin, almost transparent, 2.6 

 mm. long from the torus, the free portion depressed-obovatej broadly rounded, 

 conspicuously erose-ciliate; exterior teeth with a triangular base adnate to the 

 base of the calyx, prolonged into a straight, spreading, subulate tip 5 mm. long. 

 Petals and stamens lacking. Ovary superior, 3-celled, tipped with an erect, 

 strongly fimbriate collar. 



TYPE: from wet rocks on the escarpment of Cerro Sipapo, Bassett Maguire & 

 Louis Politi 27505; New York Botanical Garden. Although stamens are lacking, 

 its close similarity to D. repens, even in many details of structure, proves that 

 the two are congeneric, but not that they belong to Diolena. Our species differs 

 from P. repens in the greatly elongate and consequently very conspicuous exterior 

 teeth of the calyx and in the fimbriate summit of the ovary,, 



Tateanthus duidae Gl. 



Scandent shrub, occasional, north escarpment of Cerro Duida, Maguire & Ma- 

 guire 29092; also recently collected on Cerro Paru by Mrs. Phelps and Hitchcock. 



