STANDLEY TREES AND SHRUBS OP MEXICO. 1057 



flowers terminal, solitary ; calyx appressed-setulose, the tube 8 mm. long, 

 the lobes 5 to 6 mm. long ; petals pink, 1 cm. long. 



4. Monochaetum deppeanum (Schlecht. & Cham.) Naud. Ann. Sci. Nat. III. 



4: 165. 1850. 



Rhexia deppeana Schlecht. & Cham. Linnaea 5: 566. 1830. 



Monochaetum tripUncrve Naud. Ann. Sci. Nat. III. 4: 51. 1845. 



Veracruz and Chiapas. Guatemala. 



Slender shrub, 1.2 meters high or less, the branches densely appressed- 

 setulose; leaves 1 to 2.5 cm. long, 3 to 6 mm. wide; flowers terminal, usually 

 solitary ; calyx appressed-setulose ; petals about 1 cm. long, red-purple. 



5. Monochaetum alpestre Naud. Ann. Sci. Nat. II. 4: 50. 1845. 

 Monochaetum naudinimnim Neum. Kev. Hort. 1861: 211. 1861. 

 Oaxaca, Guatemala. 



Slender shrub, the branches sparsely setulose, especially at the nodes ; 

 leaves ovate or ovate-oblong, 1 to 1.5 cm. long, 5 to 8 mm. wide, acute, pale 

 beneath, ciliate; calyx sparsely setulose; petals 1.5 to 2 cm. long. 



6. Monochaetum bracteolatum Triana, Trans. Linn. Soc. Bot. 28: 64. 1871. 

 Reported from Dos Puentes. Panama. 



Branches sparsely glandulai'-hirtellous ; leaves oblong-lanceolate, 5-nerved, 

 3 to 5 cm. long, sparsely setulose; calyx sparsely setulose; petals 7 to 8 mm. 

 long. 



7. Monochaetum candollei Cogn. in DC. Monogr. Phan. 7: 396. 1891. 



Type from Mount Orizaba and Yaqueria del Jacal, Veracruz, altitude 3,300 

 meters. 



Branches subglabrate, setose at the nodes; leaves long-petiolate, oblong- 

 lanceolate, 2 to 3.5 cm. lony, 6 to 10 mm. wide, sparsely setose, ciliate, tripli- 

 nerved ; calyx glandular-setulose ; petals pink, 12 to 14 mm. long. 



8. Monochaetum fioribundum (Schlecht.) Naud. Ann. Sci. Nat. III. 14: 165. 



1850. 



Rhexia floribunda Schlecht. Linnaea 13: 431. 1839. 



Monochaetum rivulare Naud. Ann. Sci. Nat. III. 4: 50. 1845. 



Veracruz, Oaxaca, and Chiapas. Central America. 



Shrub, the branches densely hirsute; leaves short-petiolate, oblong, lance- 

 oblong, or ovate-oblong, 1.5 to 5.5 cm. long, setose; flowers in few-flowered 

 cymes; petals 7 to 8 mm. long, pink or white. " Entrodelia " (Veracruz). 



9. Monochaetum calcaratum (DC.) Triana, Trans. Linn. Soc. Bot. 28: 63. 



1871. 



Arthrostemma calcaratum DC. Prodr. 3: 138. 1828. 



Monochaetum ensiferum Naud. Ann. Sci. Nat. III. 4: 50. 1845. 



Monochaetum candollcanum Naud. Ann. Sci. Nat. III. 4: 50. 1845. 



Monochaetum oUganthum Naud. Ann. Sci. Nat. III. 14: 159. 1850. 



Veracruz and Oaxaca, and perhaps elsewhere. 



Branches sparsely setulose ; leaves short-petiolate, lanceolate, 1.5 to 3 cm. 

 long, 3 to 7 mm. wide, triplinerved, sparsely setulose ; flowers solitary ; calyx 

 densely appressed-setulose ; petals 1.5 cm. long, pink or purple. 



12. CALYPTRELLA Naud. Ann. Sci. Nat. III. 18: 115. 1852. 



1, Calyptrella galeottii Naud. Ann. Sci. Nat. III. 18: 115. 1852. 

 Type from mountains of Oaxaca. Costa Rica. 



