Il8 COULTER AND ROSE 



Costa Rica : altitude 2000 meters, 7 onduz 4274, July 10, 1891 ; 

 Toiiditz 7677, March 1S93; Tonduz 8358, November 1893. 



Hydrocotyle ranunculoides L. f. Suppl. 177. 1781. 



Durango : near city of Durango, Palmer 216, May 5-June 24, 1896. 

 Costa Rica: San Jose, Tondtiz 1688, December 1889. 



Hydrocotyle umbellata L. Sp. PI. i : 234. 1753. 



Tepic : near town of Tepic, JVelson 4175^ April 9, 1897. 

 Costa Rica: Aguacalienta, Pittier^ May 2, 1890. 



2. MICROPLEURA Lag. in Ocios Esp. Emigr. 4 : 347. 1825. 



A genus of a single species, endemic in the Mexican and Central 

 American region. Both Urban and Drude refer the genus to Cen- 

 tella^ recently separated again from Hydrocotyle^ but in our judgment 

 it should be kept distinct. It is restricted to the high mountains, 

 while Centella^ at least our American species, belongs to the low 

 ground. 



Micropleura renif olia Lag. 1. c. ; also Obs. Aparas. 15. 1826. 

 Centella refti/olia (Lag.) Urban in Mart. Fi. Bras, iji: 286. 1879 



Oaxaca : San Felipe, Pose 4609, Jvme 16-21, 1899. 



Chiapas: above San Cristobal, altitude 2100-2400 meters, JVelson 



3145, September 18-22, 1895. 

 Tepic : on the mountain between Dolores and Santa Gertrudis, 



Pose 2056, August 7, 1897. 



3. BOWLESIA Ruiz. & Pav. Prod. Fl. Peruv. 44. pi. 34. 1794. 



Chiefly a South American genus, but two species extending into 

 our region. In addition to B. lobata Ruiz. & Pav., given by Hemsley, 

 we cite the following : 



Bowlesia palmata Ruiz. & Pav. Fl. Peruv. 3: 28. pi. 2^1. 1802. 



Chihuahua : under cliffs, canyons of the Sierra Madre, Pringle 

 1248, October 3, 1887. 



4. SPANANTHE Jacq. Collect. 3: 247. 1789. 



A genus extending from the Mexican and Central American region 

 into Tropical South America. Hemsley gives the following two 

 species: S. a7igulosa Turcz. and S. paniculata Jacq., but, as he re- 

 marks, the former is probably a variety if not merely a form of 

 the latter. 



