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



Perdiciura calycinum. Mart. Mss. 

 In Bahi4 Brasiliensium. Martins, ij . 



Friitex facie jEthonicefruticosce*, erectus, rigidus, ramosissimus, 

 fragilis. Ramuli teretes, undique villis copiosis glandulis mi- 

 nutis pedicellatis interstinctis vestiti. Folia alterna, petio- 

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

 approximatis subserrata, basi attenuata, subtiis copiosfe vil- 

 loso-lanata, supr^i demiim nuda, viridia, bi- v. tripoUicaria, 

 semunciam v. ultra lata. Corymbi terminales, lax^ divari- 

 cati. Pedunculi filiformes, minute glandulosi, pollicares 

 V. bipoUicares, apicem versus crassiores, squamis aliquot 

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

 ferh Kleinia, simplex, decaphyllum minute glandulosum, 

 basi bracteol4 angustissim4 instructum : foliolis lineari- 

 subulatis, erectis, acutis, flosculis longioribus. Receptacu- 

 lum copies^ villosum. Flosculi 10 — 12, hermaphroditi, bi- 

 labiati ; labio exteriore ligulato, patulo, acute tridenticulato ; 

 interiore bipartito : laciniis lineari-lanceolatis, acutis, revo- 

 lutis, apice imberbibus. Anthera basi \ongh biaristatae, ap- 

 pendicul4 lineari-lanceolata obtusiusculd terminatae. Stig- 

 ma bipartitum : laciniis recurvatis, ' semicylindricis, apice 

 truncatis, papilloso-puberulis. Achenia longa, teretiuscula, 

 undique aspere papillosa, apicem versus paululi^m angusti- 

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



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

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

 Perdicium corymbosum. Herb. S. et M. 

 In Mexico. Sesse et Mocinno. Tj . 



Caidis lignosus, diffusa ramosissimus. Rami teretes, cortice 

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



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



ceolata. 



