188 Mr. D. Don's Descriptions of new Genera and Species 



Perdiciura calycinum. Mart. Mss. 

 In Bahia Brasiliensium. Martins. ^ . 



Frutex facie Mthonia fruticosa* , erectus, rigidus, ramosissimus, 

 fragilis. Ramuli teretes, undique villis copiosis glandulis mi- 

 nutis pedicellatis interstinctis vestiti. Folia alterna, petio- 

 lata, ovato-lanceolata, acuta, acute dentata, turn dentibus 

 approximates subserrata, basi attenuata, subtus copiose vil- 

 loso-lanata, supra, demum nuda, viridia, bi- v. tripollicaria, 

 semunciam v. ultra lata. Corymbi terminales, laxe divari- 

 cati. Pedunculi filiformes, minute glandulosi, pollicares 

 v. bipollicares, apicem versus crassiores, squamis aliquot 

 (2 — 3) lineari-lanceolatis acuminatis muniti. Involucrum 

 fere Kleinia, simplex, decaphyllum minute glandulosum, 

 basi bracteola angustissimd instructum : foliolis lineari- 

 subulatis, erectis, acutis, flosculis longioribus. Receptacu- 

 lum copiose villosum. Flosculi 10 — 12, hermaphroditi, bi- 

 labiati ; labio exteriore ligulato, patulo, acute tridenticulato ; 

 interiore bipartite* : laciniis lineari-lanceolatis, acutis, revo- 

 lutis, apice imberbibus. Antherce basi longe biaristatae, ap- 

 pendicula lineari-lanceolata obtusiusculci terminate. Stig- 

 ma bipartitum : laciniis recurvatis, semicylindricis, apice 

 truncatis, papilloso-puberulis. Achenia longa, teretiuscula, 

 undique aspere papillosa, apicem versus paululum angusti- 

 ora. Pappus capillaris, cinereus, denticulis asper, caducus. 



3. T. corymbosa, foliis petiolatis lanceolatis integerrimis puberu- 

 lis, involucro 8-phyllo : foliolis lineari-lanceolatis acutis. 

 Perdicium corymbosum. Herb. S. et M. 

 In Mexico. Sesse et Mocinno. ^ . 



Caulis lignosus, diffuse ramosissimus. Rami teretes, cortice 

 striato cinereo-fusco obducti. Folia sparsa, petiolata, lan- 



* Edinb. New Phil. Jonrn. 1. c. p. 309. 



ceolata, 



