1914] Braiidrgcc: Planfac Mc.ricanac I')irj>Hsianac, VI 75 



This plant somewhat resembles P. cJtala role pis Rob. & Greenman, 

 with which species Dr. Robinson has obligingly compared it. Collected 

 on Cerro del Boqueron. No. 6639. Type, Herb. Univ. Calif.. No. 

 172354. 



TONALANTHUS gen. nov. Helianthearum 



Capitnla heterogama, radiata. fioribus radii sterilibus, disci her- 

 maphroditis. Involiicriim hemisphaericiim. braeteis 3-seriatis. exteri- 

 oribus olilongis. obtnsis. coriaceis. Reeeptacnlnm cohimnare. paleis 

 complicatis Hores disci amplectentibus. CoroUae radii ligulatae aj^ice 

 3-dentatae. disci regulares tubo limbum eylindraceum aequanti. limbo 

 apice longe 5-fido. Antherae basi minute 2-mncronatae. Achaenia 

 siibcompressa apice pappo sqnamoso. lanceolato. coronata. Ilci-ha 

 perennis. Folia opposita. Capitula longe pedunculata. 



Tonalanthus aurantiacus sp. nov. 



Canlibus simplicibus. crassis. foliosis, albo-tomentosis, ca. 1 dm. altis : 

 foliis eordatis, grosse crenato-dentatis, apice acutis, laminis ca. 9 cm. 

 longis, 8 cm. latis, utrinque pa rum pubescentibus. basi abrupte in 

 petiolum alatum ca. 7 mm. longum abeuntibus ; pedunculis 1-3, axil- 

 laribus, 1-floris, ca. 3dm. longis; eapitulo diametro ca. 18mm. radiis 

 excludentibus; involucri squamis exterioribus brevioribus, tomentosis; 

 receptaculo ca. 5 mm. longo, 2 mm. lato; paleis scariosis acnminatis; 

 floribus radii discique aurantiacis ; ligulis 8 mm. longis ; pappi squamis 

 ca. 8, anguste lanceolatis. achaeniis aequilongis. 



Collected on Sierra de Tonala. No. 7002. Type. Herb. Univ. Calif., 



No. 173087. 



Zexmenia Purpusii sp. nov. 



Arbor : ramis pubescentibus : foliis late ovatis acuminatis, supra 

 scabridis, subtus pilosis, basi in petiolum attenuatis, margine serratis, 

 ca. 9cm. longis. 6cm. latis: floribus ramos terminantibus subcorym- 

 bosis ; involucris camj^anulatis, ca. 7 mm. alti.s iatisque ; st[uamis 2- 

 seriatis, oblongis, coriaceis. acutis. pubescentibus, margine ciliatis. 

 ligulis tlavis, ca. 6mm. longis; radii achaeniis 3-quetris, anguste 3- 

 alatis. aristis pappi ad angulos inao(|ualibus ; disci achaeniis a latere 

 compressis, sepius anguste alatis. interdum alis cum aristis pappi 

 adnatis, aristis duabus achaenia aequantibus, squamellis nullis: paleis 

 apice obtusis, aristatis. 



This pliiiil is a small tree ali<mt twenty feet high. Tt differs from 



the description of Z. scandens Hemsley in having the ciliate scales of 



the involucre 2-seriate, no squamellae between the awns of the pappus 



and wings often adnate to the awns. Collected on Cerro del Boqueron. 



No. 6660. Type. Ilcrl). Univ. (^nlif.. No. 172310. 



