STANDLEY TREES AND SHRUBS OF MEXICO. 1049 



2. Centradenia grandifolia (Schlecht.) Endl. Gen. PI. 1207. 1836-50. 

 Playiopliyllum grandlfolium Schlecht. Linnaea 13: 429. 1839. 

 Type from Chiconquiaco, Veracruz. Guatemala. 



Stems 30 to 50 cm. h'gh; leaves oblong-lanceolate, 7 to 11 cm. long and 2 to 

 3 cm. wide or smaller, acuminate, pilosulous ; cymes many-flowered ; petals !J 

 mm. long. 



3. Centradenia salicifolia T. S. Brandeg. Univ. Calif. Publ. Bot. 4: 379. 1913. 

 Known only from the type locality, wet rocky slopes of the Sierra Madre 



above Misantla, Veracruz. 



Stems suft'rutescent, puberulent or glabrate; leaves lanceolate, 13 cm. long 

 or less, nearly glabrous ; cymes lax, many-flowered ; calyx sparsely setose ; 

 petals purplish, 6 to 7 mm. long. 



4. Centradenia inaequilateralis (Schlecht. & Cham.) Don, Hist. Dichl. PI. 2: 



755. 1832. 



Rhexia inaequilateralis Schlecht. & Cham. Linnaea 5: 567. 1830. 



Plagiophyllum parvifoUum Schlecht. Linnaea 13: 428. 1839. 



Centradenia rosea Lindl. Bot. Reg. 29: ?)/. 20. 1843. 



Veracruz ; type from Cuesta Grande de Chiconquiaco. Central America. 



Plants very slender, 30 to 80 cm. high, often suffrutescent, short-hirtellous ; 

 leaves mostly 2 to 4 cm. long, sometimes larger, narrowly lanceolate, sparsely 

 hirtellous or glabrate; calyx hirtellous; petals 5 to 6 mm. long, purplish pink, 



3. ARTHROSTEMMA Ruiz & Pa v. Fl. Peru v. Chil. 4: pi. 326. 1802. 



Plants herbaceous or sometimes suffrutescent at base, dichotomous ; leaves 

 petiolate, 5 or 7-nerved, serrulate; flowers terminal, cymose, pink or puiTile, 

 4-parted ; calyx glabrous, the tube narrow, the lobes very short ; petals obo- 

 vate; anthers obtuse, the connective of the larger ones produced below the 

 cells, with a filiform anterior appendage ; capsule 4-valvate. 



Stamens all of about equal length 1. A. fragile. 



Stamens very unequal, the larger ones twice as long as the others. 



2. A. campanulare. 



1. Arthrostemnia fragile Lindl. Journ. Hort. Soc. 3: 74 1848. 

 Heteronoma galeottianum Naud. Ann. Sci. Nat. III. 14: 151. 1850. 

 Veracruz and Chiapas. Central America ; Cuba. 



Stems succulent, glabrous or sparsely glandular-pilose; leaves oblong-ovate, 

 3 to 6.5 cm. long, acuminate, rounded at base, 5-nerved ; calyx 7 to 9 mm. long ; 

 petals pink, 2 to 2.5 cm. long ; capsule 10 to 12 mm. long. " Jazmfn months " 

 (El Salvador). 



2. Arthrostemma campanulare (Naud.) Triana, Trans. Linn. Soc. 28: 35. 



1871. 



Heteronoma campanulare Naud. Ann. Sci. Nat. III. 14: 153. 1850. 



Chiapas. Central America and northern South America. 



Branches sparsely glandular-pilose when young or glabrous; leaves ovate or 

 oblong-ovate, 4 to 6 cm. long acuminate, rounded or subcordate at base, 5- 

 nerved ; calyx 7 to 8 mm. long ; petals purple, 1.5 to 2 cm. long ; capsule about 

 1.5 cm. long. 



4. ACISANTHERA Adans. Fam. PI. 2: 85. 17flR. 



1. Acisanthera quadrata Juss. ; Poir. Encycl. Suppl. 1: 111. 1810. 

 Rhexia acisanthera L. Syst. Nat. ed. 10. 998. 1759. 

 Guerrero and Veracruz. West Indies ; Central and South America. 



