STANDLEY — TREES AND SHRUBS OF MEXICO. 681 



4-lobate ; petals usually 4, reflexed or spreading ; stamens 4 ; ovary 2 to 4-celled ; 



fruit drupaceous, 1-celled. 



Inflorescences nearly sessile; leaves all linear or lance-linear, less than 3 nnu. 



wide 1. R. managuatillo. 



Inflorescences long-pedunculate ; leaves lanceolate or broader, most of tliem 

 more than 1 cm. wide. 

 Branchlets sharply angled. 

 Leaves densely pubescent, obtuse or rounded at apex ; calyx pubescent. 



2. R. uragoga. 



Leaves glabrous, acuminate; calyx glabrous 3. R. scoparia. 



Branchlets terete or nearly so. 



Leaves glabrous beneath ; fruit 10 to 12 mm. long 4. R. oxyphylla. 



Leaves puberulent beneath along the veins ; fruit about 15 mm. long. 



5. R. macrocarpa. 



1. Rhacoma managuatillo Loesener, Repert. Sp. Nov. Fedde 8: 294. 1910. 

 Michoacan ; type from Panda. 



Shrub ; branchlets slender, sharply quadrangular, glabrous or when young 

 short-pilose; leaves 4 to 17 mm. long, entire or obscurely crenulate, sessile, 

 glabrous; inflorescence few-flowered, short-pilose, the flowers green; fruit red, 

 8 to 10 mm. long, long-pedicellate. " Managuatillo." 



2. Rhacoma uragoga (Jacq.) Baill. Hist. PI. 8: 27. 1877. 

 Myginda uragoga Jacq. Enum. PI. Carib. 12. 1760. 



Myginda coccinea Turcz. Bull. Soc. Nat. Moscou 36*: 604. 1863. 



Veracruz and Oaxaca. Cuba; Colombia. 



Slender shrub, the branchlets densely short-pilose ; leaves short-petiolate, 

 ovate to rounded-ovate, 1.5 to 5 cm. long, irregularly serrate or subentire; 

 inflorescence short, few or many-flowered, the flowers dark red ; petals 1.5 mm. 

 long; fruit red, 5 to 7 mm. long. " Hierba maravedi " (Cuba). 



3. Rhacoma scoparia (Hook. & Arn. ) Standi. 



Ml/gin a a scoparia Hook. & Arn. Bot. Beechey Voy. 283. 1841. 



Known only from the vicinity of Acapulco, the type locality. 



Slender shrub, glabrous throughout ; leaves short-petiolate, lanceolate or 

 ovate, 2 to 4 cm. long, those of the flowering branches often much reduced, 

 serrulate ; inflorescence few-flowered ; flowers deep red ; fruit red, about 6 mm. 

 long. 



4. Rhacoma oxyphylla (Blake) Standi. 



Myginda oxyphylla Blake, Contr. Gray Herb. n. ser. 53: 60. 1918. 



Oaxaca ; type from Cafetal Nueva Esperanza, Pochutla, altitude 800 meters. 



Leaves short-petiolate, lanceolate or elliptic-lanceolate, 4 to 7.5 cm. long, 

 1.2 to 2.5 cm. wide, acuminate, crenate-serrulate ; panicles 7.5 cm. long or 

 shorter, slender-pedunculate; petals purplish, 1.5 mm. long. 



5. Rhacoma macrocarpa (T. S. Brandeg.) Standi. 



Myginda macrocarpa T. S. Brandeg. Univ. Calif. Publ. Bot. 6: 56. 1914. 

 Known only from the type locality, Finca Mexiquito, Chiapas. 

 Shrub ; leaves oblong-ovate or elliptic, 9 cm. long and 4 cm. wide or smaller, 

 acuminate, obscurely crenate-serrulate, short-petiolate. 



10. FORSELLESIA Greene, Erythea 1: 206. 1893. 



1. Forsellesia spinescens (A. Gray) Greene, Erythea 1: 206. 1893. 



Glossopetalon spinescens A. Gray, PI. Wright. 2: 29. pi. 12. f. B. 1853. 



Northern Chihuahua. Oklahoma and western Texas to southern California ; 

 type from Frontera, Texas. 



