VOL. 5] New Species of Mexican Plants. 249 
tis; petalis calyce duplo longioribus; peduuculis 1-2-floris, 2-5 
em. longis. 
This small tree is mentioned in my lists of Cape Region plants 
under the name of Bursera laxiflora, which some forms of it 
resemble. The color of the bark easily distinguishes them, that 
of &. laxiflora being reddish, and that of B. filicfolia gray. 
The leaves of the form most deat approaching B. laxiflora 
differ from it in having more crowded, pubescent and smaller 
leaflets. An extreme form from La Paz has small leaves resemb- 
ling fronds of Chetlanthes tomentosa. It is common throughout 
the Cape Region of Baja California. 
Bursera Purpusii. Frutex ramulis cinereis glabris; foliis 
imparipinnatis utrinque viridibus, 2-3-jugis, 6 cm. longis, ad 
apicem ramulorum congestis, petiolo interdum angustissimo- 
alato; foliolis anguste ovatis vel spatulatis, obtusis basi cuneatis, 
usque 2.2 cm. longis, 8 mm. latis, inferioribus minoribus, fere 
Sessilibus, nervis lateralibus paullum prominulis; drupis sub- 
globosis brunneis solitariis; pedicellis deflexis, 2 mm. longis. 
Flores ignoti. 
Collected at Zacuapan and described in the collector’s notes as 
a small shrub growing on rocky slopes of barrancas. No. 2045. 
Xanthoxylum peninsulare. Frutex ramosissimus 1 m. altus; 
Cortice cinereo; ramis junioribus cinereo-pubescentibus; aculeis 
conicis fuscis 4 mm. longis: foliis 4-12 cm. longis pubescentibus 
imparipinnatis; foliolis 1-2-jugis petiolatis, late ovatis obtusis 
vel oblongo-acuminatis, 3-6 cm. longis, 1-5 cm. latis, margine 
leviter crenatis, coriaceis, pellucido-punctatis: paniculis termin- 
alibus et axillaribus foliis brevioribus: floribus masculis 4-5~ 
Meris, pedicellis 2-3 mm. longis; carpellis maturis plerumque 
Solitariis. 
Collected in the Cape Region of Baja California, at San José 
del Cabo, San Bartolomé, Sierra de la Laguna by the writer, and 
at Las Animas. No. 270, Purpus. Ss 
Croton Coatepensis. Fruticosus ramosus, ramis juvenilibus 
Pilosis: foliis ovato-acuminatis basi cuneatis, glanduloso-denticu- 
latis, pagina inferiore densissime stellato-pilosa, superiore pubes- 
cente et viridiore; limbi foliorum 2.5~-3.5 cm. longi, I-1.5 cm. 
