94 Britton : Cuban Plants New to Science 



mm. long, obtuse or acutish, glabrous ; corolla pinkish-white, 12-13 

 mm. broad ; filaments pubescent near the base ; capsule immature. 



White sandy places, vicinity of Los Indios, Isle of Pines 

 (Britton & Wilson 14205). 



Family APOCYNACEAE 



Rauwolfia linearifolia Britton & Wilson, sp. nov. 



A glabrous shrub 4.5 dm. high, with slender grayish branches. 

 Leaves in whorls of 3's, linear, 4-6.5 cm. long, 3-4 mm. wide, 

 dark green above, paler beneath, the midvein prominent on both 

 surfaces, the lateral veins indistinct; calyx-lobes lanceolate, 1 1.5 

 mm. long, acute to acuminate ; corolla purplish, its tube slender, 

 7-9 mm. long, the lobes elliptic, 4 mm. long, 1 .3 mm. wide ; ovary 

 immersed in a cup-shaped disk ; style filiform ; carpels two, united 

 at the base, one carpel sometimes abortive. 



Type collected on limestone hill, Paso Estancia to the Pinales, 

 Oriente (Shafcr 1754). 



Echites minima Britton & Wilson, sp. nov. 



Stems slender, twining, puberulent. Leaves oblong, 1-2 cm. 

 long, 4-5 mm. broad, acuminate at the apex, rounded and cordate 

 at the base, glabrous, short-petioled, the midvein indistinct above, 

 prominent beneath ; calyx-lobes elliptic-lanceolate to elliptic, 2-2.5 

 mm. long, 1-1.1 mm. broad, acuminate at the apex; corolla-tube 

 3-3.5 mm. long, the lobes suborbicular, light yellow, 3.5 mm. 

 long, 4 mm. broad. 



In dry grassy places, barren savannas southeast of Holguin, 

 Oriente (Shafer 2955) . 



An incomplete specimen from savannas between Queen City 

 and Minas, Camaguey (Shafcr 2028 s ), is referred to this species 

 with doubt. 



Family CONVOLVULACEAE 



Exogonium incertum Britton, sp. nov. 



Vine, slender, glabrous up to 8 dm. long or longer. Leaves 

 unknown ; corymbs few-several-flowered, short-peduncled ; pedi- 

 cels 5-12 mm. long ; sepals about 6 mm. long, elliptic-ovate, obtuse 

 or rounded ; corolla tubular- f unnelf orm, glabrous, pink with a 

 purple throat, 3-4 cm. long, its tube very narrow within the calyx, 

 gradually enlarged above, its limb about 1.5 cm. broad; capsule 



