Jennings: Contribution to Botany of Isle of Pines. 245 



apice saepe paulo dilatatis, obtusiusculis, capitulo longioribus, ad 

 basin pallidioribus, margine ciliatis, maturatis valde reflexis; calyce 

 4-5 mm. longo, tubo 2-2.5 mm. longo, campanulato, basi et praesertim 

 parte media paulo incano-pilosulo, minute glanduloso-punctulato, lobis 

 subrectis, lanceolato-subulatis, ciliatis, ca. 2.5 mm. longis, sub- 

 eequalibus, maturate 6-8 mm. longo; corolla ca. 7-9 mm. longa, 

 extrinsecus parce brevissime patenti-pilosula, in parte 1/2 superiore 

 bilabiata, labiis valde ineequalibus, parum expansis, labio superiore 

 vix I mm. longo, lobis late ovatis, apice rotundatis, labio inferiore 

 3.5-4 mm. longo, lobo medio rotundato, emarginato, valde cucullato, 

 margine minute eroso, lobis lateralibus medio 1/2 brevioribus, oblique 

 ovatis obtusis; staminibus fauci insertis, corolla paulo brevioribus, 

 antheris omnibus fertilibus, reniformibus; stylo Isevi, apice breviter 

 bilobo, lobis oblongis; nuculis ca. i mm. longis, atro-fuscis, nitidis, 

 ovalibus. 



Type. Scrubby woods southwest of Bibijagua, May 7, 1910, 

 0. E. Jennings, No. 86. Specimen in the herbarium of the Carnegie 

 Museum. Of the same species is also No. 264, A. H. Curtiss, "West 

 Indian Plants." Near Nueva Gerona, January i, 1904. The latter 

 specimen was distributed as Mesosphcerum rugosum (Linnaeus) Pollard. 



Mesosphcerum Hollandianiim is most closely related to M. rugosum 

 (Linnaeus) Pollard {Hyptis radiata Willdenow), a rather common 

 plant of wet places and swamps from North Carolina to Florida and 

 Texas and by various authors identified and reported for localities 

 southward in continental tropical America as far as Colombia. M. 

 Hollandianum differs, however, from the continental species in the 

 very much narrower and blunter and more remotely crenate leaves, 

 the plant much more nearly glabrous, and the bracts and calyx-lobes 

 practically glabrous, but decidedly, although minutely, ciliate. M. 

 angustifolium is to be regarded probably as having been derived by 

 isolation from M. rugosum. 



This species has been named in honor of Dr. W. J. Holland, the 

 Director of the Carnegie Museum, to whom much credit is due for 

 his support and encouragement of the studies of the natural history 

 oi the Isle of Pines. 



Hyptis (1786) has been adopted by the International Congress in 

 place of Mesosphcerum (1756), contrary to the principle of priority, 

 hence the name of the species described above would be, according to 

 the International Rules of Botanical Nomenclature, Hyptis Hollandi- 

 ana. 



