448 Mr. G. Bentham's Enumeration of the Plants 



the ovarium, is so marked, that the genus cannot but be preserved. 

 Chascanum of E. Meyer, formed of some old Buchneras, and which 

 I had erroneously referred to Selagineee, is a distinct group correctly 

 placed by E. Meyer and by Endlicher next to Verbena. 



75. Tamonea spicata. Aubl. PI. Guian. ii. p. 660, t. 268. — British Gui- 

 ana. Schomburgk. French Guiana. Leprieur, Herb. Par. n. 169. Also 

 Babia. Gardner, n. 899, and Blancbet, n. 2566. 



Among the remaining Verbeneee, Casselia is a very marked group, 

 so also Priva ; but it is surely by inadvertence that Phryma has 

 been joined to it ; for notwithstanding some general resemblance in 

 habit, the structure of the fruit and convolute cotyledons are so very 

 singular, that it can only be considered as an isolated genus not 

 really belonging to any of the great tribes of Verbenacea. I am un- 

 acquainted with Monochilus of Fischer and Meyer, which is probably 

 allied to Casselia, or with Buchia of Humboldt and Kunth, which is 

 surely no true Verbenacea, perhaps a Polemoniacea. Chloanthes of 

 R. Brown, the only four- ovulated genus with a simple axillary in- 

 florescence, is somewhat anomalous in appearance ; but the ovarium 

 is that of the true Verbenea. The central cavity of the fruit is here 

 intersected by the axis, which gives the appearance of two additiona 

 empty cells. 



Tribe Durante^. 



These are allied to Verbeneee by their inflorescence, to Viticece by 

 their more arborescent habit, and by the position of the ovula, which 

 are laterally attached to the fleshy axis of the ovarium, either at their 

 base or above it, but always below the middle. The ovule is thus 

 frequently more or less amphitropous. The calyx generally grows 

 after the flowering is over, and either incloses the fruit at its matu- 

 rity, or forms an expanded cup under it. 



76. PetrcBa macrostachya, sp. n., arborea, foliis ovali-elllpticis breviter 

 acuminatis scaberrimis, racemo elongate, pedicellis fructiferis tubo calycis 

 brevioribus, calycis laciniis lineari-oblongis subspathulatis acuminatis aristu- 

 latis. Folia semipedalia. Racemus 14 — 2-pedalis, pendulus. Calyces flo- 

 rigeri subsessiles, longiores at tenuiores quam in plerisque speciebus. — On 

 the brook Currassawaak. British Guiana. Schomburgk, n. 158. 



Besides Petrcea, the Durante^ comprehend Citharexylum, Duranta 

 and Pbppigiu {BQxtero, not Presl.), which last genus has been alter- 

 nately united with Citharexylum and with Duranta, having some of the 

 characters of each, but with flowers diff^erent from either. There appear 

 to be two species, diff'ering from each other in the size of the flower, 

 the form and size of the berry, and, in some respects, in the form of 

 the leaf, one from Chili, the other from the isle of Juan Fernandez. 



