ON THE APOCINE^. 241 



PRESTONIA. 



Char. Corolla hypocrateriformis. Faux coronata tuhulo 

 annulari indiviso squamiso^t 5, interioribus laciniis limbi 

 alternantibus. 



AnthercB semi-exsertse, sagittatse, medio stigraati cohae- 

 rentes, lobis posticis poUine vacuis. 



Ovaria 3. Stylus 1, filiformis, apice dilatato. Stigma 

 turbinatum apiculo angustiore. 



Urceolus hypogynus, 1-phyllus. 



FoUiculi 



Habitus. Frutex volubilis, tomentosus. Folia oppo- 

 sita, tomentosa. Corymhi congest! interpetiolares. Calyx po 

 foliaceus, laciniis basi intus squamula instructis. 



Patria. America Meridionalis. 



p. tomentosa. 



Hab. In sepibus prope Rio de Janeiro, in Brasilia, de- 

 texit Josephus Banks, Baronettus. 



Obs. This genus is named in memory of Dr. Charles 

 Preston, the correspondent of Ray, and styled by him, 

 " eruditissimus vir, et curiosissimus stirpium observator." 

 Many of his observations, chiefly on the more minute 

 plants, occur in Ray's " Methodus emendata." Blair also 

 mentions him as an ingenious and expert botanist. 



BALPOURIA. 



Char. Corolla infundibuliformis. Faux coronata tii- 

 bulo crenulato. Limbi laciniae rectae, sequilateres. 



Stamina semi-exserta, fauci inserta. Antherce sagittatse, 

 medio stigmati cohaerentes, raucronatse. 



Ovarium biloculare. Stylus 1, filiformis, apice dilatato. 



Stigma angulatum. 



Squamula 1 0, basi calycis extra corollam insertse : hy- 

 pogynse nuUse. 



FoUiculi 



Habitus. Arbor inter minores. Folia opposita, lanceo- 



16 



