STANDLlEY TREES AND SHRUBS OP MEXICO. 1137 



DOUBTFUL SPECIES. 



Fraxinus ovALiroLiA (Wenzig) Lingelsh. Bot. Jahrb. Engler 40: 221. 1907. 

 Fraxinus americana var. uhdei /3 ovali folia Wenzig, Bot. Jahrb. Engler 4: 182. 

 1883. Described from Mexico, the locality not indicated. The fruit is not 

 known and the position of the plant is uncertain. The vernacular name is 

 given as " fresnillo." 



2. MENODORA Humb. & Bonpl. PL Aequin. 2: 98. 1809. 



Plants low, herbaceous or usually woody, at least at base; leaves opposite, 

 or the upper alternate, sessile or nearly so, entire or lobed ; flowers perfect, 

 yellow, solitary or corymbose ; calyx with 5 to 15 linear lobes ; corolla subro- 

 tate to salverform, the limb 5 or 6-lobate ; stamens 2 ; capsule didymous, 2- 

 celled, each cell usually 2-seeded. 



Corolla tube elongate, longer than the limb, the lobes acuminate. 



1. M. longiflora. 

 Corolla tube shorter than the limb. 



Leaves mostly pinnatifid 2. M. heterophylla. 



Leaves entire. 



Calyx lobes 5 or 6 3. M. scoparia. 



Calyx lobes 7 to 15. 



Stems erect, 20 to 50 cm. high ; flowers usually corymbose. 



Calyx lobes about 12 mm. long, pilosulous 4. M. mexicana. 



Calyx lobes less than 10 mm. long, glabrate or scaberulous. 

 Leaves bractlike, 4 to 5 mm. long; stems striate-angulate. 



5. M. intricata. 

 Leaves well developed, larger; stems not conspicuously striate. 



6. M. scabra. 

 Stems diffusely branched, low, spreading; flowers mostly solitary. 

 Stems hirtellous; leaves mostly oblong-elliptic. 



7. M. helianthemoides. 

 Stems glabrate or scaberulous; leaves linear or nearly so. 



8. M. coulteri. 



1. Menodora longiflora. A. Gray, Amer. Journ. Sci. II. 14:45. 1852. 

 Menodoropsis longiflora Small, Fl. Southeast. U. S. 917. 1903. 

 Coahuila. Western Texas and southern New Mexico ; type from Texas. 

 Plants erect, usually woody at base, glabrous or scaberulous ; leaves lineai 



or lanceolate, 1.5 to 2.5 cm. long, subsessile, entire ; flowers few, usually 

 corymbose ; corolla yellow, the tube 2 to 5 cm. long. 



2. Menodora heterophylla Moric. ; DC. Prodr. 8:316. 1844. 

 Bolh'aria grisehacliii Scheele, Linnaea 25: 254. 1852. 



Nuevo Leon and Tamaulipas. Western Texas ; type collected between Laredo 

 and San Antonio. 



Plants chiefly herbaceous, diffuse and spreading, scaberulous or nearly 

 glabrous; leaves pinnatifid into 3 to 7 linear lobes, or some of them entire; 

 flowers mostly solitary, yellow or purplish; corolla 1 to 1.5 cm. long; capsule 

 about 1 cm. broad. 



3. Menodora scoparia Engelm. ; A. Gray in Brewer & Wats. Bot. Calif. 1: 



471. 1876. 

 Baja California, Coahuila, and Durango ; type from Saltillo, Coahuila. 

 Arizona and southern California. 



