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j{0^y^ MEXICAN AND (^EKTRAL AMERICAX PLANTS. 131 



SPECIES OF SEVERAL GENERA. 



Apium ammi rr1>an. 

 Collected by J. N. Rose and Jos. II. raiiiter, on mountain side, Hacienda de la 



Encarnacion, Mexico, July 7, 1905 (no. HiC^l). 



# 



Centella asiatica (L. ) Urban. 



Collected by Dr. E. Palmer, near San Pie^^uito, Sun T^uis Potosl, June, 1905 



(no. 625). 



This is the first time the ^enns \vdH been reported from Mexico, although its occur- 

 rence there is not a surprise, Jt ^vill (loubtlesj^ be found in many places along the 



eastern coaat. 



Coaxaua ebracteata Roye. 



Oaxacana ebradaUa Rose, Contr. Nat. Herb. 8: 837. 1905, ]>y error. 



Stems tall, 60 cm. or more high, erect, glabrous; upper leaves twice ternate; leaflet 

 ^ ovate, acute, more or less cleft and sharply serrate; petioles wanting, the stipular 

 bases of the leaves nmcli enlarged and scarious; peduncles short, 7 to 8 cm. long; ^ 

 rays numerous, spreading, t] to 4 cm. lung; iuvolucreand involuccl bractlcts wanting; ' 

 flowers purplish, the sterile ones on sU-ndrr pedicels, the fruiting ones very short or 



subsessile. 



Collected by C. and E. Seler between iluitztan and Oxchuc, Chiapas, March U, 



1906 (no. 2148). 



Hydrocotyle sp. 



Collected by J. N. Rose and Jos. H. Painter, on river bank near Ixmiiiuilpan, 



Hidalgo, July 29, 1905 (no. 9082). 



Hydrocotyle sp. 



Collected by J. X. Rose and Jos. II. Painter, on river bank in alluvial soil near 



Tomellm, Oaxaca, September 4, 5, 1905 (no. 10053). 



Lomatium dasycarpum (Torr. & Gr.) Coult. & Rose. 



Collected by E. A, Goldman in the San Pedro Martir Mountains, Lower Cali- 

 fornia, July 15, 1905 (no. 1138). 



This is new to tlie 3Iexican Flora. 



Sphaenosciadium eryngiifolium (Greene) Coult. & Rose. 



Collected by E. A. Goldman in the San Pedro Martir Mountains, Lower Cali- 

 fornia, Mexico, 1905 (no. 1280). 



This is new to the Mexican Fkjra. 



ADDENDA, 



A NEW lONOXALIS. 



lonoxalis stolonifera Rose, sp. nov.^' 



A very delicate plant producing long, slender, branching stolons; bulbs small for 

 the genus (4 to 5 mm. in diameter), growing in damp moss on i.erpendicular cliffs; 

 bulb scales thin, black, 3-nerved; leaflets 3, 5 to 18 mm. lung, wedge-shaped, the 

 apex strongly notched and the lobes usually very uncnpial; peduncles slender, 

 usually longer than the petioles, solitary or few-flowered; sepals 2 nun. long; petals 

 violet-purplish, 12 mm. long. 



rtThis remarkable species, inserteil while the i>aper is iu proof, is the only one 

 herein published based on the collections of 1906. 



