1924] Brandegee: Plantae Mexicanae Purpusianae, XII 417 



Borreria aiiriculata sp. nov. 



Erecta ramosa : caiilibiis obscure tetragonis scabridis ca. 3 dm. 

 altis : foliis anguste ovato-lanceolatis basi in petiolum breve attenuatis 

 utrinque scabridis, oppositis usque ad 5 cm. longis, 8 mm. latis; 

 stipularum setis quam vaginam triplo longioribus : capitulis plerumque 

 caules ramosque terminantibus ; involucri foliis 4 ad folia suprema 

 sessilibus, lanceolatis basi late auriculatis; calyce 4-dentato dentibus 

 ovato-acutis ciliatis ; corolla alba infundibulif ormi ca. 25 mm. longa 

 denies calycis superanti, tubo gracili, lobis ciliatis. 



The specimens are young and have no mature fruit. The 

 glomerules of flowers terminating the stems and branches appear to 

 have a 6-foliate involucre, but they are sessile between two lanceolate 

 leaves connected by setiferous stipules. Collected in moist rocky 

 meadows near Jalisco, Chiapas. No. 9218, Type, Herb. Univ. Calif. 

 No. 22338. 



Borreria chiapensis sp. nov. 



Erecta, ramosa, annua : caulibus 4-sulcatis, glabris, 4—5 dm. altis : 

 foliis oblongo-lanceolatis basi in petiolum angustatis, penniveniis 

 supra paulo scabridis, subtus ad venas paululum scabridis, margine 

 hispidis, usque ad 9 cm. longis, 8-15 mm. latis; stipulis cum petiolis 

 in vaginam setosam connatis, setis ramosis quam vaginis glabris 

 longioribus : capitulis ramos caulesque terminantibus rariter axil- 

 laribus, f oliolis 4 inaequalibus ca. 3.5 cm. longis involucratis ; calycis 

 dentibus 4 lanceolatis basi setosis ; corolla alba calycem paulum super- 

 anti tubo gracili fauce ampliata; stylis ramis 2 brevibus cum antheris 

 breviter exsertis. 



The leaves are longer than the internodes. The intervals between 

 the grooves of the stem are curved : they cannot be described as 

 quadrangular. The setae of the stipules are narrowly lanceolate and 

 the margins ciliate. Collected in pine forests near Hacienda Mon- 

 serrate, Chiapas. No. 9216. Type, Herb. Univ. Calif. No. 223384. 



Borreria arenicola sp. nov. 



E radice lignosa multicaulis: caulibus prostratis, tetragonis, 

 glabris, ramosis, paulo alatis, ca. 12 cm. longis: foliis verticillatis, 

 anguste lineari-ovatis, prope basin angustatis, apicibus acutis, glabris, 

 ca. 9 mm. longis, medio ca. 3 mm. latis; setis stipularum vagina brevi- 

 oribus: capitibus terminalibus axillaribusque foliis 4 involucratis, 

 floribus parvis: capsulis oblongis dentibus 2 brevibus coronatis; fructu 

 2-cocco, coccis 1-spermis ; semine ca. 3 mm. longo paulo rugoso. 



Collected in a sandy arroyo near Jalisco, Chiapas. No. 8968. 

 Type, Herb. Univ. Calif. No. 220266. 



