246 ' Annals of the Carnegie Museum. 



624. Mesosphaerum capitatum (Jacquin) O. Kuntze. 



Hyptis capilata Jacquin, Icones Plantarum Rariorum, I, 1 781-1786, p. 11, PI. 114; 



Grisebach, Flora of the British West Indian Islands, 1861, p. 488. 

 Mesospharum capitatum O. Kuntze, Revisio Generum Plantarum, II, 1891, p. 525. 



Near Nueva Gerona, March and April, 1904, A. H. Curtiss, No. 417. 

 General Distribution: Generally distributed through the West Indies 

 and continental tropical America; also in the Malayan Archipelago 

 (introduced ?). 



625. Mesosphaerum actinocephalum (Grisebach) O. Kuntze. 



Hyptis aclinocephala Grisebach, Catalogus Plantarum Cubensium, 1866, p. 212. 

 MesosphcBrum actinocephalum O. Kuntze, Revisio Generum Plantarum, 1891, p. 

 526. 



Northern part of the island, Blain, No. 26 (Millspaugh). General 

 Distribution: Western Cuba and the Isle of Pines. 



626. Mesosphaerum capitellatum Jennings, sp. nov. (Plate XXVI.) 



Plant more or less incano-tomentose; branches virgate, obtusely 

 4-angled; leaves spatulate-obovate or oblong-obovate, at the base 

 gradually narrowed into a very short margined petiole, at the apex 

 obtuse or rounded, the upper margin serrulate, more or less incano- 

 tomentose on both sides, paler underneath, on the upper surface 

 reticulate and with strongly impressed nerves, 1-2.5 cm. long, 5-1 1 

 mm. wide; flower-bearing nodes distant (2-3 cm.); leaves of the in- 

 florescence 1-1.5 cm. long; peduncles slender, 5-9 mm. long; heads 

 globose, densely many-flowered, about 6-7 mm. in diameter; bracts 

 linear-subulate, 1-1.5 mm. long, laxly tomentose; calyx about 2.2 mm. 

 long, in fruit 3.5 mm. long, the tube obconic, strongly recurved at the 

 apex, laxly pilose, the calyx-lobes triangular, subequal, strongly 

 incrassate-subulate at the apex, usually subhamate, minutely more 

 or less glandular-puberulent, i mm. long; corolla about 3 mm. long, 

 very shortly pilose outside, the upper one-third bilabiate, the anterior 

 lobe strongly cucullate, narrow, the lateral lobules oblique, ovate, 

 and obtuse, the posterior lobes wide and broadly rounded; stamens 

 inserted in the throat, prominently exserted, the anthers almost 

 round; style smooth, apically very shortly bilobate; the seeds oval, 

 about 0.7 mm. long, 3-4 mm. thick, minutely verruculose, yellowish 

 brown. 



Planta plus minusve minute incano-tomentosis; ramis virgatis, 



