418 University of California PiCbJicaiions in Botany [Vol. 10 



Borreria heterophylla sp. no v. 



E radiee peronni multicaulis: canlibiis ramosis, acute tetragonis, 

 angulis scabridis, ca. 5 cm. longis : foliis ovato-acviminatis, ca. 1 cm. 

 longis, nunc 8 mm. latis prope basim angustatis, nunc 2 mm. latis 

 basi lata sessilibus, glabris ; setis stipularum ca. 3 mm. longis, quam 

 vagina multo longioribus: capitibus paucifloris terminalibus axil- 

 laribusque, foliis inaequalibus ca. 6 involucratis, foliis majoribus 

 pinnato-venosis : floribus parvis ; capsula calycis dentibus deltoideo- 

 lanceolatis 3 coronata ; semine ca. 1 mm, longo. 



The long conspicuous bristles of the stipules are characteristic of 

 this species. Collected with the preceding species in a sandy arroyo 

 near Jalisco, Chiapas. No. ^969. Type, Herb. Univ. Calif. No. 220267. 



Diodia pulchella sp. nov. 



E radiee lignosa multicaulis : caulibus gracilibus paulo ramosis 

 tetragonis pubescentibus cum pilis intermixtis, usque ad 6 dm. longis : 

 foliis lanceolatis apice setiferis utrinque scabridis subtus ad costam 

 hirsutis margine revolutis serriilato-scabris, 1.5 cm. longis, 3 mm. 

 latis ; stipulis ca. 2 mm. longis, hirsutulis, setis 8 mm. longis : verti- 

 cillis 2-3-floris ; calycis dentibus inaequalibus subulatis : corolla in- 

 fundibuliformi 1 cm. longa, lobis ovato-acutis ut videtur siccatis 

 lilacinis; stylo exserto ramis 2 brevibus; stigmatibus capitatis. 



The flowers of this species are large for the genus. The slender 

 elongated stems must have been prostrate or supported by other plants. 

 Collected near Hacienda Monserrate, Chiapas. No. 9221. Type, Herb. 

 Univ. Calif. No. 223390. 



Marsypianthes arenosa sp. nov. 



Herbacea, ramosa, undique viscoso-pubescens, arena adhaerente, 

 sparsa : foliis ovatis, ca. 3 cm. longis, 1.3 cm. latis, apice acutis, basi 

 cuneatis, margine dentatis ; petiolis 2-3 mm. longis : capitulis axil- 

 laribus, versus ad ramorum apices eongestis spicam formantibus; 

 pedunculis usque ad 7 mm. longis ; calyce late campanulato, 5-dentato, 

 demum explanato ; nuculis brunneis facie interiore concavo-cymbi- 

 formi, margine involutis, laceratis. Flores desunt. 



The specimens do not show the habit of the plant, but the sand 

 adhering to the stems, leaves, and calyces indicates that it is of pros- 

 trate habit. Collected near Jalisco, Chiapas. No. 8988. Tj-pe, Herb. 

 Univ. Calif. No. 220282. 



