24 PROCEEDINGS OF THE AMERICAN ACADEMY. 
glabro nutanti ; filamentis glabris ; stylo 1 cm. longo ; capsula ca. 1 em. 
diametro obtuse 3-lobata subsphaerica ; seminibus viridescenti-griseis 
angulatis 6 mm. longis. — Cafion walls of limerock, Iguala Cavfion, 
near Iguala, Guerrero, Mexico, alt. 760 m., 28 December, 1906, C. G. 
Pringle, no. 13,914 (type, in hb. Gray). This noteworthy species is 
probably the most showy of the genus. It differs from P. bracteatus 
(Jacq.) Boiss. in having pubescent leaves, denser inflorescence, and 
larger much more caudate-acuminate and strongly colored bracts. 
Bonplandia linearis Robinson, n. sp., herbacea ramosa dense caes- 
pitosa gracilis 4 dm. vel ultra alta ubique glanduloso-pubescens ; ramis 
erectis vel ascendentibus ; foliis alternis anguste linearibus 3-4.5 cm. 
longis vix 2 mm. latis sessilibus attenuatis cum lobis lateralibus 2 an- 
gustis late patentibus instructis ; racemis erectis laxifloris 1-1.5 dm. 
longis ; floribus saepissime geminis in pedicellis erectis ca. 1 cm. longis 
nutantibus ; calyce tubuloso 15-striato et venoso-reticulato anthesi 8 
griseo-puberulo et atomifero, dentibus lanceolatis parvis acutis erectis 
1.5-2 mm. longis ; corolla molliter puberula anguste tubulata leviter 
curvata 2.6 em. longa, limbo valde ringenti, labio superiore erecto sub- 
eucullato inferiore deflexo ca. 2 mm, longo: staminibus juxta labium 
