1915J Bvandegee: Plantae Mexicanae Purpusianae, VII 183 



Guaiacum unijugum sp. uov, 



Frntex ca. 2 m. altns : foliis f asciculatis puberiilis ; foliolis imi jugis 

 sessilibns inaequilateralibus, ca. 6 mm. longis latisque. apieulatis 

 giabris ; petiolis 2-3 mm. longis, pubescentibus : Horibiis singulis ; pedi- 

 cellis ca. 8 mm. longis; sepalis 5; petalis 5 caeruleis, ca. 1 cm. longis: 

 ovario pubescenti ; frnctibiis giabris 2-5-angulatis apieulatis. 



The single pair of l)road leaflets well mark this species. It is the 

 plant noted in Proc. Calif. Acad. Ser. 2, 119, as "Guaicum sanctum 

 L. ?" Collected by T. S. Brandegee near San Jose del Cabo, Baja Cali- 

 fornia. Type. Herb. Univ. Calif. No. 109558. 



Esenbeckia. collina sp. nov. 



Foliis ternatis ad apices ramnlornm confertis. foliolis obovatis fere 

 giabris. usque ad 7 cm. longis, 4 em. latis, basi cuneatis, foliolo terminali 

 majori ; petiolulis brevibus; petiolis 1.5-3 cm. longis pubescentibus: 

 floribus pentameris paniculatis ; paniculis ca. 9 cm. longis ramis paucis ; 

 sepalis latissime ovatis. pustulatis ciliatis; petalis (ex siccis) brunneo- 

 purpureis margin ibus albis, crassis oblongis, -4 mm. longis, pellucido- 

 punetatis. alabastro imbricatis : ovario alte 5-lobato valde tuberculato. 

 Fructus deest. 



Collected on Cerro de Picacho, Oaxaca. No. 7140. Type, Herb. 

 Univ. Calif. No. 173396. 



Acalypha capitellata sp. nov. 



Frutescens monoica : caulibus hirsutis : foliis ovatis longe acumi- 

 natis margine crenato-serratis, laminis ca. 8.5 cm. longis. 5 cm. latis. 

 utrinque sparsim hirsutis ; petiolis hirsutis ca. 5.5 cm. longis : spicis 

 axillaribus; masculis ca. 6 cm. longis, laxifloris sessilibus; femineis 

 capitatis paucifloris longe pedunculatis, bracteis unifloris parvis. usque 

 ad basim in lacinias 3-5 lineares daetyliformes stipitato-gianduliferes 

 sectis. sepalis hirsutis; stylis ca. 10-lacinulatis; pedunculis hirsutis 

 superne stipitato-giandulosis, ca. 4 cm. longis. Fructus deest. 



Easily recognized by its long-peduncled, small, capitate female in- 

 florescence. Collected on the eastern slope of Cerro del Boqueron, 

 Chiapas. No. 7348. Type, Herb. Univ. Calif. No. 174839. 



Acalypha sabulicola sp. 



nov. 



E radice lignosa 1-2 dm. alta. undique pilosa: caulibus ramosis: 

 foliis ovato-acuminatis basi cuneatis margine crenato-serratis, usque ad 

 3 cm. longis. 1.4 cm. latis; petiolis ca. 1 cm. longis: fl()ril)us maseulis 

 axillaribus, congestis in spicas graciles ca. 1.1 em. longis apice flore 



