344 FIELD MUSEUM OF NATURAL HISTORY BOTANY, VOL. II 



Inguila, altitude 2000 m., 31 December, 1908, C. Conzatti, no. 2351 

 (hb. Field Museum). 



The species here proposed belongs to the same group as Ruellia 

 Bourgaii Hemsl. and R. pulcherrima T. Anders. From the former it 

 differs in the outline, size, pubescence and texture of the leaves, smaller 

 flowers, more lanceolate calyx-divisions, pubescent ovary and fewer 

 ovules; from R. pulcherrima it differs in having larger leaves, shorter 

 calyx, the absence of stipitate glands, and in the more conspicuously 

 ventricose and larger corolla. 



COUTAREA ACAMPTOCLADA Rob. & Millsp. Engl. Bot. Jahrb. xxxvi. 



Beibl. Ixxx, 28 (1905). 



This species was described originally from flowering specimens 

 (Seler, no. 4044) with quite undeveloped leaves, hence the following 

 characters pertaining to foliage and fruit may be here recorded, as 

 follows: Folia petiolata elliptica vel oblongo-obovata 2-3.5 cm - longa 

 1-1.7 cm - lata ad apicem saepissime rotundata et'cuspidata rarius 

 emarginata integerrima basi cuneata utrinque glabra subtus palidiore; 

 petiolis i cm. vel minus longis; capsulis pedicellatis oblongo-ovoideis 

 1.5-2 cm. longis circiter i cm. latis muriculatis; seminibus numerosis 

 alatis. MEXICO. State of Yucatan: Port Silam (Tzilam), Dr. G. F. 

 Gaumer, coll. of 1895, no. 682 (hb. Field Museum). 



Adenostemma nutans Greenman, sp. nov. 



Herba glabra i m. alta; caule striato-angulato; foliis oppositis, 

 superioribus sessilibus ovatis acuminatis obtusis minute serrato-dentatis 

 3-nerviis; inflorescentiis terminalibus corymboso-cymosis; capitulis 

 numerosis homogamis plerumque nutantibus 8-10 mm. altis; squamis 

 involucri 2-seriatis lineari-oblongis vel spathulatis 4-6 mm. longis 

 glabris obtusis vel rotundatis integerrimis, exterioribus brevioribus; 

 floribus numerosis; pappi setis plerumque 2 (1-3) papillo-clavatis 

 perbrevibus vel multoreductis; corollis ca. 4mm. longis flavo-viridibus 

 5-dentatis extus sparsissime subglanduloso-hirtis; achaeniis obliquis 

 2.5-3 mm - longis 5-costatis inter costis tuberculoso-glandulosis. 

 MEXICO. State of Vera Cruz: in marshy land near the City of Vera 

 Cruz, 13 April, 1910, C. R. Orcutt, no. 3410 (hb. Field Museum, cat. 

 no. 280116). 



But for the presence of a reduced pappus the plant here described 

 might be referred equally well to Gymnocoronis, and habitally it re- 

 sembles G. subcordata DC., but differs in involucral and achenial char- 

 acters. In most cases, however, the pappus is present in the form of 

 one to three papillose-clavate much reduced setae, hence its affinity 

 seems rather to be with Adenostemma. 



