1885.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 473 



(Phoradendum flavescens). The Screw Bean is no longer seen. Here 

 begin the Eetama (ParMnsonia aculeata) and Huisache (Acacia Farnesi- 

 ana), elegant trees becoming more frequent and of larger size below. 

 Common and conspicuous are the thorny, yellow-flowered ParMnsonia 

 Texana; the white-leaved, purple-flowered Caulophyllum Texanumj the 

 fragrant Lippia lycioides and graveolens; the Majorano (Salvia ballotw- 

 flora), and the Guayacan (Porliera angustifolia). The other shrubs are: 



Calliandra conferta. 



Castela Nicholsoni (Goat-bush). 



Shwfferia cuneifolia. 



Bumelia lanuginosa and spinosa. 



Lantana macrocarpa and Camara. 



Diospyros Texana (Persimmon). 



Mozzina spathulata (Sangre de dragon). 



Larrea Mexicana (Creosote-bush). 



Flourensia cernua. 



Lycium Carolinianum. 



Celtis pallida (Granjeno). 



Forestiera angustifolia. 



Kceberlinia spinosa (Junco). 



Condalia Mexicana, obovata, spathulata. 



Colubrina Texensis. 



Zizyphus obtusifolius. 



The following climbers are characteristic : 



Ipomcea sinuata. 



Clematis Drummondii. 



Philibertia cynanchoides. 



Maximowiczia Lindheimeri. 



Passiflora tenuiloba and fcetida. 



Roulinia unifaria. 



Cuscuta decora. 

 In tjie early summer the bottom is covered with the flowers of Callir- 

 rho'e involucrata, (Enoihera speciosa, tetraptera and sinuata, Anemone his- 

 pida (with purplish flowers), Phacelia Popei, Monarda citriodora and 

 punctata, Gaillardia pulchella, Dichetophora campestris, Selenium am- 

 phibolum and ooclinium. 



Other herbs, growing in various situations, are : 

 Xeptunia pubescens. 

 Dalea lasiathera. 

 Psoralea rhombifolia. 



Malvastrum leptophyllum, tricuspidatum, pedatifidum. 

 Sphceralcea hastulata. 

 Melochia pyramidata. 

 Hermannia Texana. 

 Galphimia linifolia. 



