578 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Leaves glabrous beneath or nearly so. 

 Leaves deltoid-cordate or ovate-cordate, deeply cordate at base. 



2. S. selerianum. 

 Leaves oval, elliptic, or ovate, rounded or subcordate at base. 



3. S, mucronatum. 



1. Stigmaphyllon lindenianum Juss. Arch. Mus. Hist. Nat. (Paris) 3: 362. 



1844. 



Stigma phyllon lupulus S. Wats. Proc. Amer. Acad. 21: 461. 1885. 



San Luis PotosI to Yucatan and Chiapas ; type from Teapa, Tabasco. Central 

 America. 



Coarse scandent shrub; leaves entire, undulate, or deeply lobate, rounded to 

 acuminate at apex, truncate or cordate at base ; larger petals 9 to 11 mm. long ; 

 samaras 2 to 2.5 cm. long. " Chinaca " (Veracruz). 



2. Stig'maphyllon selerianum Niedenzu, Stigmatoph. 2: 7. 1900. 

 Oaxaca and Chiapas ; type from Almoloyas, Oaxaca. 



Leaves 2 to 9 cm. long, entire or undulate, deeply cordate, w^ith rounded 

 sinuses, long-petiolate ; petals 1.3 to 1.5 cm. long. 



3. Stigmaphyllon mucronatum (DC.) Juss. Arch. Mus. Hist. Nat. (Paris) 3: 



377. 1844. 



Banisteria mucronata DC. Prodr. 1: 589. 1824. 



Banisteria ternata Moc. & Sess6; DC. Prodr. 1: 591. 1824. 



Veracruz and Oaxaca. Central America and northern South America ; type 

 from Ecuador. 



Slender scandent shrub ; leaves 3 to 9 cm. long, rounded to acute at apex, pale 

 beneath ; larger petals 1.3 to 1.8 cm. long ; samaras 2 to 2.5 cm. long. " Bejuco 

 de rat6n " (Guatemala, Honduras). 



75. POLYGALACEAE. Milkwort Family. 



(Contributed by S. F. Blake.) 



Herbs, shrubs, or trees, sometimes scandent, with alternate (in all the follow- 

 ing species) or sometimes opposite or whorled, entire leaves, without stipules or 

 with small stipular glands ; flowers perfect, zygomorphic, racemed, the racemes 

 sometimes paniculate; sepals 5, free or the two lower united, one dorsal, two 

 ventral, two lateral and interior, the latter (wings) usually much larger than 

 the others and petaloid; petals 3, rarely 5, hypogynous, the ventral one (keel) 

 boat-shaped, often with a terminal beak or crest, the two upper usually ligulate 

 or oblong, the two lateral rarely present, always very small; stamens 8 (in all 

 the following species), the filaments united for most of their length into a sheath 

 split on the upper side, united at base to the upper petals or the keel or both ; 

 anthers 1-celled, opening by terminal pores; disk usually represented by a gland 

 at base of ovary ; ovary 1 or 2-celled ; style 1 ; stigma often 2-lobed ; ovules soli- 

 tary, pendulous ; fruit a capsule, drupe, or samara ; seeds usually pubescent and 

 arillate. 



Ovary and fruit 2-celled; fruit a dehiscent capsule 1. POLYGALA. 



Ovary and fruit 1-celled ; fruit indehiscent. 



Keel with a plicate crest; fruit a samara, with a large wing on the lower 

 side — 2. SECURIDACA. 



Keel not crested ; fruit drupelike, not winged 3. MONNINA. 



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