Trelease — The Agaveae of Guatemala. 135 



Agave tortispina n. sp. 



Acaulescent, not cespitose. Leaves white-glaucous on 

 a yellow-green ground, more or less transversely 

 banded, forming a close rosette, broadly oblanceolate- 

 spatulate, subacuminate, somewhat concave, slightly 

 granular beneath, 10x25-30 cm.: spine red-brown be- 

 coming smoky, glossy, slightly granular below, very tor- 

 tuous, very openly grooved from above the middle with 

 acute edges, ventrally and dorsally keeled, decurrent for 

 scarcely its own length, somewhat intruded into the 

 green tissue on both faces, 4x30 mm.: teeth similarly 

 colored, 15-25 mm. apart, 3-5 mm. long, nearly straight, 

 broadly triangular, rather gradually dilated into the tops 

 of high green prominences between which the margin is 

 nearly straight, or which are separated by acute sinuses. 

 Inflorescence, flowers and fruit unknown. 



Specimens examined: Guatemala. Cruz, between El 

 Rancho and Sanarate (Trelease, 1, March, 1915 — the 

 type in the herbarium of the University of Illinois). 



Agave pachycentra n. sp. 



Acaulescent, little suckering. Leaves very blue-glau- 

 cous on a deep green ground, ascending in a close rosette, 

 broadly oblong-oblanceolate, acute, concave, minutely 

 granular beneath, 15-20x35-60 cm.: spine drab or gray- 

 ing, dull or slightly glossy, more or less granular, stoutly 

 half-conical or triquetrous, somewhat wavy, very openly 

 grooved from near the end with acute edges, usually ven- 

 trally and dorsally keeled, decurrent for about its own 

 length, more or less intruded into the green tissue on 

 both faces, 8x50-60 mm. : teeth similarly colored, rather 

 dull, mostly 25-40 or 50 mm. apart, 5-10 mm. long, more 

 or less curved, especially downward, heavily triangular, 

 abruptly dilated into fleshy prominences or frequently 

 shouldered at base, the intervening margin somewhat 

 concave. Inflorescence, flowers and fruit unknown. 



