350 FIELD MUSEUM OF NATURAL HISTORY BOTANY, VOL. II 



2.5 mm. longis cano-hirtellis. MEXICO. State of San Luis Potosi; 

 Alvarez, 28 September to 3 October, 1902, Dr. Edward Palmer, no. 177 

 (hb. Gray and hb. Field Museum). 



Senecio (Terminales) Orcuttii Greenman, sp. nov. 



Arborescens 2-3 m. altus; foliis petiolatis oblongo-ovatis usque ad 

 6 dm. longis 3-3.5 dm. latis profunde pinnato-partitis, lobis oblongo- 

 lanceolatis 4-18 cm. longis 1.5-4.5 cm. latis acuminatis acutis remote 

 apiculato-dentatis ciliatis supra atro-viridibus subtus pallidioribus 

 utrinque parce pubescentibus vel glabris; inflorescentiis terminalibus 

 corymboso-cymosis glabris vel sparsissime pubescentibus; capitulis 

 numerosis 12-15 mm. altis heterogamis minute calyculatis; involucris 

 subcylindratis vel anguste campanulatis, squamis 8 lineari-lanceolatis 

 12-13 KKQ-. longis acutis vel obtusis glabris; floribus femineis ligulatis, 

 tubo ca. 7 mm. longo, ligulis flavis i cm. longis 3-4 mm. latis; floribus 

 disci 12-15, corollis sursum gradatim ampliatim 5-dentatis; pappi setis 

 albis caducissime; achaeniis striato-costatis ca. 4 mm. longis glabris. 

 MEXICO. State of Vera Cruz: Omealca, near Cordova, on limestone 

 cliffs, 6 April, 1910, C. R. Orcutt, no. 3150 (hb. Field Museum, cat. 

 nos. 279188-90). 



The writer has at hand but a leaf and a part of an inflorescence yet 

 the plant belongs evidently to the section Terminates Greenm. and is 

 allied to S. arborescens Seem, and S. copeyensis Greenm. From both 

 these species, however, S. Orcuttii is distinguished readily by the deeply 

 pinnately parted almost compound leaf and large heads. 



PlCRIS ECHIOIDES L. Sp. PI. 792 (1753). 



Good specimens of this species were collected at Cherubusco, 

 Distrito Federal, Mexico, 4 October, 1910, C. R. Orcutt, no. 4283 (hb. 

 Field Museum, cat. no. 282479). The plant is well established at this 

 station, but the species seems not to have been reported hitherto from 

 Mexico. 



