STANDLEY TREES AND SHRUBS OF MEXICO. 45 



4. Alsophila schiedeana Presl ; Kunze, Linnaea 13 : 149. 1839. 



Mountains of Veracruz and Chiapas, the type from Veracruz. Also in 

 eastern Guatemala, apparently common, at 275 to 1,000 meters altitude. 



Arborescent ; stipe dull brown, angulate, freely armed with stout straight 

 spines up to 5 mm. long ; blades ample, the rachis pale brown, aculeolate ; 

 pinnae spreading, linear-oblong to oblong, acuminate, up to 70 cm. long and 

 25 cm. broad, the secondary rachis deciduously squamulose-puberulous beneath ; 

 pinnules linear-oblong, acute or acuminate, spreading, with minute hairs and 

 brown bullate scales beneath, the latter extending to the costules ; veins simple 

 or once forked, glabrous; sori nearly medial. " Malque " (Chiapas). 



5. AlsopMla microdonta Desv. Mem. Soc. Linn. Paris 6: 319. 1827. 

 Polypodium microdonton Desv. Ges. Naturf. Freund. Berlin Mag. 5 : 319. 1811. 

 Polypodium aouleatum Raddi, Opusc. Sci. Bologna 3: 288. 1819. Not P. 



aculeatum L. 1753. 



AlsopMla armata Mart. Icon. PI. Crypt. 72. pi. 28, 48. 1834. Not A. arniata 

 Presl, 1836. 



Veracruz and Tabasco. Guatemala to Brazil, mainly at low elevations 

 near the coast ; known in the West Indies only from the Isle of Pines ; type 

 doubtfully South American. 



Caudex 1 to 5 meters high ; fronds arcuate-spreading, 2 to 2.5 meters long, 

 the long brown stipes freely armed with very short, narrowly conical spines up 

 to 1 cm. long, similar but smaller ones occurring sparsely on the primary and 

 secondary rachises tbroughout ; pinnae narrowly oblong, abruptly acuminate, 

 30 to 60 cm. long. 10 to 25 cm. broad ; pinnules spreading, linear-oblong, attenu- 

 ate ; segments linear, falcate, obliquely incised except at the dilatate _base, 

 membranous, the costule bearing a few long septate hairs beneath and, with 

 the veins, also thinly and laxly puberulous with minute tortuous hairs ; sori 

 numerous, nearly medial, often confluent. 



6. AlsopMla myosuroides Liebm. Dansk. Vid. Selsk. Skrivt. V. 1: 236. 1849. 

 Veracruz to Chiapas, at low elevations, the type from the region of Chi- 



nantla. British Honduras, eastern Guatemala, and Honduras, at 180 meters 

 altitude or less ; abundant in the province of Pinar del Rio, Cuba, and the Isle 

 of Pines, herbarium material having been widely distributed under the manu- 

 script name AlsopMla icrightii Underw. 



Caudex § to 5 meters high ; fronds ample, the stout brown stipes thickly 

 aculeolate and clothed with copious stiff, acicular, bright brown scales at the 

 base, muricate above ; pinnae petiolate, narrowly oblong, long-acuminate, 40 

 to 65 cm. long, 15 to 22 cm. broad ; pinnules stalked, linear-attenuate or oblong- 

 linear and abruptly long-caudate, the costae sparsely hirsute beneath ; segments 

 linear, falcate, acutish, serrate, herbaceous, dull green; costules sparsely 

 hirsute beneath ; sori very numerous, usually confluent. 



7. Alsophila mexicana Mart. Icon. PI. Crypt. 70. pi. JfS. 1834. 



AlsopMla (jodmani Hook, in Hook. & Baker, Syn. Fil. 36. 1866. 



Mountains of Oaxaca and Chiapas, the type from San Pablo de Teoxoraulco, 

 Oaxaca. Also in Alta Verapaz, Guatemala, at 900 to 1,550 meters altitude. 



Caudex ai-borescent, presumably several meters high ; blades ample ; primary 

 rachis stout, apparently unarmed, subpersistently furfuraceous, bearing scat- 

 tered large whitish scales, and hirsute with long inflated tawny septate hairs, 

 their bases persistent, the rachis thus invariably scabrous in age; pinnae nar- 

 rowly oblong, acuminate, 50 to 60 cm. long, 16 to 22 cm. broad, the rachis similar 

 to the primary one ; pinnules close or subimbricate, sessile, linear-oblong, rather 

 abruptly long-acuminate; segments herbaceous, pinnatifid, sparsely hirsute 

 along the costules and veins on both surfaces. 



