426 PROCEEDINGS OF THE AMERICAN ACADEMY. 



pallidioribus, terminalibus 11-15 cm. longis 4.5-5.5 cm. latis obtuse 

 acuminatis mucronulatis supra medium paucis dentibus crenatis basi 

 abrupte angustatis sicut in petiolulam alatam 1-2 cm. longam, laterali- 

 bus similibus minoribus interdum obliquis acumine breviore, inflores- 

 centiae paniculis angustis axillaribus longe (ad 8 cm.) pedunculatis 

 2-cirrhosis, sepalis 5, 3 mm. longis concavis obtusis late ovatis minute 

 pubescentibus duobus exterioribus paulum minoribus, petalis 4, 3 mm. 

 longis obovatis vel suborbiculatis unguiculatis rotundatis, duobus supe- 

 rioribus squamas gerentibus latas cucullatas apice in appendicem longam 

 deflexam productas appendice et marginibus barbatas summo dorso 

 crista dilatata subflabelliforme instructas, duorum inferiorum squamis 

 minoribus margine barbatis summo dorso cuspidatis, disci glandis duobus 

 oblongis basi latioribus et callosis inter callos concavis, staminibus 8, 

 filamentis crassis extra sparse villosis, antheris introrsis, fructu trialato 

 subobovato 1.8 cm. longo 1.3 cm. lato apice leviter emarginato vel 

 rotundato basi subacute — Guerrero : Iguala Canon, alt. 915 m., July 

 24, 1907, Pringle, no. 10,380. An anomalous species, distinguished 

 from all the other species of Urvillea by its biternate leaves. In habit 

 it resembles some species of Serjania, but has the fruit of Urvillea. 



Euphorbia (§ Anisophyllum) chalicophila, n. sp.,erecta annua (?) 

 basi ramosa, caulibus teretibus gracilibus 3.5-4 dm. altis dichotome 

 ramosis pilis albis crispatis dense vestitis, foliis oppositis lanceolatis 

 basi valde obliquis subcordatis falcatis acutis vel obtusiusculis brevissime 

 petiolatis ab apice fere ad basin serrulatis pilosis, caulinis 15-19 mm. 

 longis 3-5 mm. latis, involucris brevissime pedicellatis in cymosulas 

 paucifloras bracteatas ad apices ramulorum congestis turbinatis 

 0.6 mm. altis extus glabris intus hirtellis non fissis, lobis ovato- 

 lanceolatis pectinatis, glandulis transverse ellipticis 0.5 mm. longis sub- 

 concavis appendice rubra vel rubella 0.5 mm. lata integra vel emar- 

 ginata, capsulis 1.5 mm. altis brevipedunculatis glabris vel sparse 

 pilosis, seminibus laevibus griseis ovatis haud angulatis 1 mm. longis. 

 — Jalisco : gravelly banks of gullies near Guadalajara, alt. 1525 m., 

 October 12, 1903, Pringle, no. 11,846. In habit and in the characters 

 of the involucre very like narrow-leaved forms of E. brasiliensis Lam., 

 but differing in being pilose throughout and in its smooth seeds. 



Euphorbia (§ Anisophyllum) chamaecaula, n. sp., perennis rube- 

 scens, caulibus ex apice radicis pluribus prostratis ramosis compressis 

 infra nodos paulum dilatatis glabris, foliis oppositis brevissime petio- 

 latis late ovatis basi subcordatis obliquis apice obtusis integris glabris 

 vel facie superiore sparse pilosis, caulinis 6-8 mm. longis 4.5-6 mm. 

 latis, ramulinis minoribus, involucris in axillis foliorum solitariis vel 

 apicibus ramulorum in cymosulas paucifloras aggregatis pedicellatis 



