NEW SPECIES OF CHRESTA. 939 
constituted into two sections, the characters of which are de- 
rived from the habit of the plants. Chresta, being the older 
name of the two, I retain, and shall now proceed to give an 
amended character of the genus, and a list of the species, 
including the characters of my three new ones. 
Curesta. Vell. Fl. Flum. vol. 8. t. 150, D.C. Prodr. 5. 
p. 85. Endl. Gen. Plant. n. 2230.—PycnocEPHALUM. 
DC. l.c. p. 83. Endl. I. c. n. 2925. Vernonie sectio 
Pyenocephalum, Less. in Linnea, vol. 6. p. 630. 
Capitula plurima, 2-12 flora, homogama, densissima, con- 
ferta, in glomerulum subglobosum involucri generalis destitu- 
tum. Invol. squame imbricate sicce, oblongo- vel lineari- 
lanceolate, basi nervose. Cor. regulares, quinquefide, pur- 
pureze aut rose, Achzenia sericeo-villosa. Pappus plurise- 
rialis, setaceus, scaber; setis exterioribus paucis brevioribus, 
sensim interiores SEN vel Suffrutices Bra- 
silienses, velutine, vel pubescenti-tomentose, scapigere vel ra- 
mose. Folia alterna, coriacea, integerrima aut dentata. 
Secr. 1. EucnnREsTA.—Herbe vel suffrutices ramosa, 
ramis plerumque elongatis tomentosis nudis, glomerulo 
subgloboso terminatis. 
1. C. spherocephala. D.C. Prodr. 5. p. 85.  Gardn. Herb. 
Brasil. No. 4193 et 4817. 
2. C. pycnocephala. D.C. l. c. Gardn. Herb. Brasil, No. 
4819. 
3. C. exsucca. D.C. i. c. Gardn. Herb. Brasil. No. 3260, 
3803 et 4194. x 
4. C. alpestris, (sp. n.) Gardn. Herb. Brasil. No. 4820; 
collo crasso lignoso dense tomentoso, caulibus herbtiseis 
sparse foliatis vix ramosis, foliis radicalibus coriaceis petio- 
latis spathulato-oblongis obtusis integerrimis lanato-tomen- 
tosis, caulinis similibus brevioribus, ramis terminalibus 
glomerulo globoso terminatis, lateralibus brevibus glomeru- 
lum abortivum gerentibus, capitulis oblongis sub-12-floris, 
