Vol. 34, pp. 149-154 December 21, 1921 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



ADDITIONS TO THE ORCHID FLORA OF PANAMA. 



BY OAKES AMES. 



The new species of orchids from Panama described below 

 formed part of a collection made by Elsworth P. Killip in 1917 

 and 1918 in the provinces of Panama and Chiriqui. 



The type material on which the descriptions are based is pre- 

 served in the author's herbarium and duplicate types are to be 

 found in the herbarium of the Rochester Academy of Science. 



Camaridium grandiflorum, sp. nov. 



Herba caulescens, valida, e basi decumbenti erecta, folia superiora 

 inclusa circa 37 cm. alta. Caulis vaginis distichis omnino obtectus. 

 Vaginae complanatae, arete imbricantes. Pseudobulbi rari, monophylli, 

 vaginis obtecti, ad caulem appressi, anguste oblongo-cylindracei, glabri, 

 complanati, circa 3.5 cm. alti, plus minusve sulcati. Folia adulta oblongo- 

 ligulata, usque ad 15.9 cm. longa et 2 cm. lata, apice obtuso bilobata, basi 

 complicata, coriacea, valde articulata, nervo medio supra sulcato; folia 

 juniora ovato-elliptica, conduplicata, multo breviora. Pedunculi singuli e 

 bractearum axillis exorientes, erecti et nunc leviter flexuosi, graciles, circa 

 5.5-8 cm. alti, bracteis nonnuUis laxe vaginati. Bracteae inferiores plus 

 minusve 3.4 cm. longae, circa 9 mm. latae, lineari-lanceolatae, acuminatae, 

 scariosae, laxe convoluto-vaginantes, nervosae, nervo medio praecipue 

 parte apicali dorso carinato;bractea superior ovalis, circa 2.7 cm. longa et 

 .9 cm. lata, acuminata, acuta, valde cucullata, ovarium et sepali dorsalis 

 dimidium basalem vaginans. Flos grandis. Perianthium paulo patens, 

 textura subcoriacea. Sepala lateralia 3.5 cm. longa, 9.5 mm. lata, lanceo- 

 lato-oblonga, multinervosa, sensim acuminata, marginibus anterioribus 

 involutis et in apicem mucronatum extensis. Sepalum dorsale simile, 

 paulo angustius. Petala anguste elliptico-lanceolata, circa 3 cm. longa et 

 8.5 mm. lata trans medium, marginibus superioribus involutis. Labellum 

 parvum, positu naturali gynostemio parallelum, elevatum, trilobatum, 

 valde conduplicatum et decurvum, circa 1 cm. longum; discus extensus in 

 parte basali tertia tuberculatis numerosis et in medio lamella suborbiculari 

 biloba ornatus; lobi laterales erecti, semiobcordati, obtuse acuti, antrosum 

 30— Pboc. Biol. Soc. Wash., Vol. 34, 1921. (149) 



