ON THE APOCINEJE. 241

��PRESTONIA.

Char. Corolla hypocrateriformis. Faux coronata tubulo annulari indiviso squamisqae 5, interioribus laciniis limbi alternantibus.

Anther <b semi-exsertae, sagittatae, medio stigtnati cohae- rentes, lobis posticis polline vacuis.

Ovaria 2. Stylus 1, filiformis, apice dilatato. Stigma turbinatum apiculo angustiore.

TJrceolus hypogynus, 1-phyllus.

Folliculi

Habitus. Frutex volubilis, toraentosus. Folia oppo- sita, tomentosa. Corymbi congesti interpetiolares. Calyx w foliaceus, laciniis basi intus squamula instructis.

Patria. America Meridionalis.

P. tomentosa.

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

BALFOUR! A.

Char. Corolla infundibuliformis. Faux coronata tu- bulo crenulato. Limbi laciniae rectae, aequilateres.

Stamina semi-exserta, fauci inserta. Ant her a sagittatae, medio stigmati cohaerentes, raucronatae.

Ovarium biloculare. Stylus 1, filiformis, apice dilatato.

Stigma angulatum.

Squamula 10, basi calycis extra corollam insert ae : hy- pogyna? nulla?.

Folliculi

Habitus. Arbor inter minores. Folia opposita, lanceo-

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