Plante Lindheimeriane. 225 
Guadaloupe, north of New Braunfels, in large patches. 
September. 
(636.) Mexampopium cinereum, DC. Prodr. 5. p. 518; 
Gray, Pl. Fendl. p. 78. M. leucanthum, Torr. & Gray, Fi. 
2. p. 271. Roc y declivities, Upper Pierdenales. May — 
October. — The plant is ornamental in cultivation, and bears 
a profusion of blossoms through the whole season. 
(637.) Ponymyta Uvepvaia, Linn.; Torr. & Gray, Fl. 2. 
p- 273. Bottom woods of the Guadaloupe. September. 
“Rays short, rarely seen.” But plants raised from the seeds 
in the Botanic Garden, develop rays of nearly the usual size 
for this species. 
423. Bertanpiera Trexana, DC. Prodr. 5. p. 517. Mar- 
gin of woods, in dry, stony soil, New Braunfels. May. 
424 (638). Linpnuemera, Gray § Engel. 
Capitulum multiflorum, monoicum; floribus radii 4—5 
ligulatis, foemineis, ad axillas squamarum involucri inte- 
riorum sitis; fl. disci circiter 20, tubulosis, sterilibus. In- 
volucrum duplex; exterius e squamis 4—5 laxis linearibus 
foliaceis; interius totidem membranaceo-foliaceis oblongis 
planis disco longioribus. Receptaculum planum, paleis char- 
taceis ovaria sterilia amplectentibus onustum, binis exterio- 
ribus basi cujusque squam. inter. invol. adnatis, persistentibus. 
Ligule ovales, breviter tubulate, involucrum vix superantes: 
corolla disci 4—5-dentata. Styli fl. ster. filiformes, indivisi, 
hispidi, Achenia radii ovalia, obcompresso-plana, marginato- 
alata, intus subcarinata, carina apice in dentem parvum re- 
flexum producta, alis in pappum 2-dentatum extensis; disci 
abortiva. — Herba monocarpica, erecta, scabro-hispida ; caule 
dichotomo; pedunculis subcymoso-paniculatis gracilibus mo- 
nocephalis; capitulis nutantibus ; foliis imis alternis grosse 
dentatis, caeteris oppositis sessilibus oblongo-ovatis basi hine 
inde dentatis, summis pedunculisque glandulis patelliformibus 
