STANDLEY TREES AND SHRUBS OF MEXICO. 293 



series eglandular, with introrsely 4-celled anthers, those of the third series each 

 with 2 glands at the base, the anthers extrorsely 4-celIed. 



Ovary pilose 1. P. pallescens. 



Ovary glabrous. 



Leaves sessile, cordate 2. P. amplexicaulis. 



Leaves petiolate. 

 Mature leaves conspicuously soft-pilose or villous beneath, never 3-nerved. 

 Filaments pilose. 



Leaves acute at base 3. P. psychotrioides. 



Leaves obtuse or rounded at base 4. P. mollis. 



Filaments of the outer series of stamens glabrous. 

 Leaves obtuse or cordate at base. 

 Filaments as long as the iinthers or slightly shorter. 5. P. betazensis. 

 Filaments very short or none. 



Anthers rectangular-quadrate 6. P. helicterifolia. 



Anthers elliptic 7. P. nectandroides. 



Leaves acute at base. 



Leaves lanceolate 8. P. bourgeauviana. 



Leaves elliptic or subovate 9. P. pachypoda. 



Mature leaves glabrous beneath or glabrate or short-tomentellous. never 

 soft-pilose. 

 Leaves pinninerved or very obscurely triplinorved, glabrous. 

 Filaments less than one-third as long as tlie anthers. 



10. P. subtriplinervia. 

 Filaments about as long as the anthers. 

 Flowers pubescent ; leaves less than 3 cm. wide. 



11. P. tampicensis. 



Flowers glabrous; leaves 4 to 6 cm. wide 12. P. ehrenberg'ii. 



Leaves distinctly triplinerved. 



Flowers pilose 13. P. mexicana. 



Flowers glabrous. 



Inflorescence equaling or longer than the leaves 14. P. effusa. 



Inflorescence shorter than the leaves. 



Filaments partly pilose 15. P. salicifolia. 



Filaments glabrous 16. P. barbeyana. 



1. Phoebe pallescens Mez, Jahrb. Bot. Gart. Mus. Berlin 5: 218. 1889. 

 Known only from the type locality, Orizaba. 



2. Phoebe amplexicaulis (Cham. & Schlecht. ) Mez, Jahrb. Bot. Gart. Mus. 



Berlin 5: 216. 1889. 

 Persea amplexicaulis Cham. &, Schlecht. Linnaea 5: 90. 1830. 

 Known only from the type locality, Cerro Colorado, A^eracruz. 

 Leaves cordate-oblong, 11.5 cm. long, 3 cm. wide, coriaceous, glabrous, long- 

 acuminate; inflorescence few-flowered. 



3. Phoebe psychotrioides (H. B. K.) Mez. Jahrb. Bot. Gart. Mus. Berlin 5: 



191. 1889. 

 Ocofea psychotrioides H. B. K. Nov. Gen. & Sp. 2: 172. 1817. 

 Forests of Veracruz and Oaxaca ; type from Jalapa, Veracruz. 

 Shrub ; leaves elliptic to lance-oblong, 5 to 11 cm. long, acuminate, bright 

 green and lustrous on the upper surface. 



4. Phoebe mollis Mez, Jalirb. Bot. Gart. Mus. Berlin 5: 192. 1889. 

 Described from Mexico, the locality not known. 



Leaves lanceolate, about 7.5 cm. long, acute, white-tomentose beneath. 



