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, 

 tiie 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. latifoUa, glabra, caule striate, foliis late^ovalibus obscure crcnatis in- 

 tcgcrrimisque, involucri squamis paleisque receptaculi late oboVatisglabrius- 

 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 

 pjileisque receptaculi breviter et obtuse acuminatis subnudis. — Folia sa;pe 

 3 — 4 polliccs longa, vix lineam lata. 



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

 burgk, n. G58. — French Guiana. Leprieur. 



20. CUbadium erosum. DC. Prod. 5. p. 500. — British Guiana. Schom- 

 burgk, n. 294. 



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

 mosisshmis, Cass. DC. Prod. 5. p. 508. — Dry savannahs of the Riipunoony. 

 Schomburgk, n. 380. 



The Linnsean specimen has the double involucrum as described by 

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



28. Unxia hirsuta, Rich, DC. Prod. 5. p. 507. — French Guiana. Le- 

 prieur. 



29. ^canthospermum xanthioides. DC. Prod. 5. p. 521.- — British Guiana. 

 Schomburgk, n. 063. 



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

 foliis petiolatis ovatis acuminatis serratis, basi obtusis, supra scaberrimis 

 bispidis, subtus scabro-pubescentibus triplincrviis, pedicellis 1 — 3 axillaribus 

 tcrminalibusque folio brevioribus monocepbalis bispidis, invokicri squamis 

 exterioribus ovali-oblongis extus bispidis, interioribus subjEquilongis obo- 

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

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

 1 28. Leaves 2 to 3 inches l«»g. Related to W. piilchella and Acapul- 

 censis. 



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

 Schomburgk, n. 650. Capitula saepissime sexflora. 



32. Widffta platyglossa. DC. Prod. 5. p. 5G3 ?— Dry Savannahs, British 

 Guiana. Schomburgk, n. 18$, 



