110 Plants collected by Mr. Schomburgk in British Guiana. 



By some clerical or other error the n. 247 of Schomburgk has been 

 referred by DeCandolle (Prod. 7. p. 293.) to a very different plant, 

 the Broteroa trinervata, which I have not seen in any of the Guiana 

 collections. The true genus Latreillea of DeCandolle, with which 

 the present plant agrees perfectly, is very well described in the Pro- 

 dromus, and is remarkable for its white heads of flowers, drying like 

 the whole plant to a dark brown colour. In addition to the above spe- 

 cies and to the two Brazilian ones mentioned by DeCandolle, the 

 two following new ones are contained in Pohl's Brazilian collection. 



L. latifolia, glabra, caule striato, foliis late ovalibus obscure crcnatis in- 

 tegerrimisque, involucri squamis paleisque receptaculi late obovatis glabrius- 

 culis breviter acuminatis subnudis. Folia .4 pollices longa, ultra 2 lata. 

 Capitula numerosa, corymboso-capitata. 



The Torrentia (or Torrenia) quinquenervia, Veil. Fl. Flum. 8. 1. 149, 

 represents this species very well, except that the stem appears to be 

 hairy. 



L. linearis, glabra, foliis longe linearibus integerrimis, involucri squamis 

 paleisque receptaculi breviter et obtuse acuminatis subnudis. — Folia same 

 3 — 4 pollices longa, vix lineam lata. 



25. Clibadium asperum. DC. Prod. 5. p. 506. — British Guiana. Schom- 

 burgk, n. 658. — French Guiana. Leprieur. 



26. Clibadium erosum. DC. Prod. 5. p. 506. — British Guiana. Schom- 

 burgk, n. 294. 



27. Unxia camphorata, Linn. f. DC. Prod. 5. p. 507. — Pronacron ra- 

 mosissimus, Cass. DC. Prod. 5. p. 508. — Dry savannahs of the Rupunoony. 

 Schomburgk, n. 380. 



The Linnsean specimen has the double involucrum as described by 

 Cassini. The receptacle has usually a few small unequal palese. 



28. Unxia hirsuta, Rich. DC. Prod. 5. p. 507. — French Guiana. I/e- 

 prieur. 



29. Acanthospermum xanthioides. DC. Prod. 5. p. 521. — British Guiana. 

 Schomburgk, n, 663. 



30. Wedelia scaberrima, sp. n., caule fruticoso, ramis divaricatis hispidis, 

 foliis petiolatis ovatis acuminatis serratis, basi obtusis, supra scaberrimis 

 hispidis, subtus scabro-pubescentibus triplinerviis, pedicellis 1 — 3 axillaribus 

 terminalibusque folio brevioribus monocephalis hispidis, involucri squamis 

 exterioribus ovali-oblongis extus hispidis, interioribus suboequilongis obo- 

 vatis obtusis ciliatis, ligulis 6 — 8 bifidis, achamio puberulo calyculo subbi- 

 corni fimbriato-ciliato.— Skirts of woods, British Guiana. Schomburgk, n. 

 1 28. Leaves 2 to 3 inches long. Related to W. pulchclla and Acapul- 

 censis. 



31. Wedelia discoidea, Less. DC. Prod. 5. p. 543. — British Guiana. 

 Schomburgk, n. 650. Capitula sarpissime sexflora. 



32. Wulffia platyglossa. DC. Prod. 5. p. 563 ?— -Dry Savannahs, British 

 Guiana, Schomburgk, n. 185, 



