1920.] NATURAL SCIENCES OF PHILADELPHIA. 155 



2600-2700 m.) Pennell 2158; Sibate (wet loam, alt. 2700-2800 m.), 

 Pennell 2451; Ubaque (wet ditch, edge of paramo, alt. 3000-3200 

 m.), Pennell 1902, Zipaquira (Alt. Aquila, edge of pool, just below 

 paramo, alt. 3100 m.), Pennell 2532. 



Narifio. Tuquerres (alt. 3000 m.), Triana (H, Y). 



Tolima. Murillo (pool, alt. 2600-2800 m.), Pennell 3155. 



6. MONO CARDI A 6 Pennell. gen. nov. 



Stems much branched, terete, repent, the apices ascending. 

 Leaves sessile, slightly clasping, oblong to orbicular, entire, pal- 

 mately-veined from base, obscurely glandular-dotted and not odor- 

 ous. Pedicels axillary, 6-20 mm. long, pubescent, not bracteolate. 

 Calyx of 5 very dissimilar sepals; outermost (posterior) heart- 

 shaped; two anterolaterals smaller, obliquely, or but one-half cor- 

 date- or truncate-ovate, three outer prominently reticulate; two pos- 

 tero-laterals (innermost) linear-attenuate, only % length of outer- 

 most and usually slightly longer than the capsule. Corolla 3-7 

 Mini, long, the widely-spreading lobes longer than the tube, the two 

 posterior lobes united nearly throughout; glabrous throughout, bine 

 or white. Stamens four, glabrous, didynamous (the posterior fila- 

 ments shorter and usually anthers smaller); anthers uniform, the 

 narrow sacs closely connivent, each opening its entire length. Style 

 glabrous, little exceeding the sepals. Stigma- distinct, flat. Cap- 

 sule 2-4 mm. long, much shorter than calyx, oblong or ovoid-oblong, 

 acute, brown, septicidal and loculicidal; the septum with adherent 

 thin placentae, persisting plate-like. Seeds .2 .3 mm. long, oblong, 

 blackish-brown, ridged and with cross-reticulations. 



Type species, M. violacea Pennell. 



Hydrotrxhi Small, in general aspect like this genus, differs in pos- 

 sessing a circle of bristles surrounding the ovary, pubescence within 

 over the bases of the corolla-lobes, two bract coles below the calyx, 

 and more conspicuous glands which exhale a strong aromatic odor. 



Pedicels and sepals with spreading hairs. Stems and leaves beneath 



pubescent. Corolla blue. 



Corolla 6-7 mm. long. Calyx 5-7 mm. long. Leaves 1.2-1.8 



cm. long, and nearly as wide. Stems densely hirsute, 2-3 



dm. long. 1. M . violaa a. 



Corolla 4-5 mm. long. Calyx 4-6 mm. long. Leaves .7-1.8 cm. 



long, ovate-oblong. Stems pubescent, less than 1.5 dm. 



long. 



'Name from (l.6vo<;, one, and Kapsia, heart, in allusion to the single large cor- 

 date sepal. 



