140 COULTER AND ROSE 



f erred to the genus Arracacia. The species at first suggests A. atro- 

 ptirptirea^ but the two are to be kept separate, as the following differ- 

 ences appear to be constant, A. cegopodioides is low and herbaceous, 

 arising from a deep-seated, long, spindle-shaped tuber, while A. atro- 

 purpurea is half shrubby ; the former has yellow flowers, the latter 

 purple; in the former the bractlets of the involucel are linear and fili- 

 form, insignificant and entire, and not conspicuous and serrate; while 

 the leaflets are more obtuse, with more regular and blunter teeth, etc. 



3. Arracacia atropurpurea (Lehm.) Hemsl. Biol. Centr.-Am. Bot. i : 

 564. 1880. 



Pentacrypia atropiirpn7'ea Lehm. Linn£ea 5 : 380. pi. 5. fig. 2. 1830. 

 State of Mexico : Amecameca, Altamirano 11, 12, May 11, 1890. 

 Federal District : between San Angel and Fetelpa, Alta?nirano 4, 



July 13, 1S90; Apasco, Altamirano 16, November 1890; El 



Desierto Viejo, Altamirano 27, July 1S90. 



4. Arracacia bracteata C. & R. Contr. Nat. Herb. 3: 295. 1895. 

 Chiapas: above San Cristobal, altitude 2100-3640 meters. Nelson 



3175, September 18-22, 1895; Ghiesbreght 63, in 1S64-70 (in 

 Herb. Gray). Type (no. 453) in Nat. Herb. 



5. Arracacia brandegei C. & R. Pi-oc. Cal. Acad. 2. 2: 165. 1889. 

 Type (no. 507) in Nat. Herb. 



6. Arracacia brevipes C. & R. Contr. Nat. Herb. 3: 296. 1895. 

 Stems woody, 3 to 15 dm. high. 



Oaxaca : in the Sierra de San Felipe, altitude 2850 meters, Pri7igle 

 6266, December 10, 1895. Type (no. 452) in Nat. Herb. 



7. Arracacia chiapensis C. & R., sp. nov. Plate VII. 

 Herb 12 to 24 dm. high, glabrous throughout, more or less branched 



above; radical leaves not seen ; upper stem leaves twice ternate, on 

 short inflated petioles; leaflets lanceolate, acuminate, with a broad 

 cuneate or sometimes truncate base, sharply serrate, 2.5 to 7-5 '^'^• 

 long, glabrous; peduncles axillary or terminal, 15 cm. or less long; 

 rays of umbel elongated, fruiting ones nearly equal, 6 to 7>5 cm. long; 

 involucre of 3 or 4 linear bracts ; involucels of 4 to 8 linear bractlets, 

 generally longer than the pedicels but not extending beyond the fruit; 

 pedicels with fruit usually 3 to 5, rather stout, 5 to 7.5 cm. long; 

 fruit ovate, 8 to 9 mm. long, rounded at base, glabrous; stylopodium 

 long conical ; cross-section of carpel nearly terete ; seed-face strongly 

 involute, inclosing a central cavity ; oil-tubes solitary in the intervals, 

 2 or 3 on the commissui^al side ; flowers greenish white, the buds often 

 purplish. 



Chiapas: near Finabete, altitude 2100-3400 meters, AW5o;z 3776, 

 February 8, 1896. 



8. Arracacia coulteri Rose, Contr. Nat. Herb. 3: 296. 1895. 

 Tauschia coulleri Gray, Plant. Lindh. 2: 211. 1853. 



