Trelease — The Agaveae of Guatemala. 147 



Agave Americana L. 



Leaves lanceolate, narrowly so in age, usually hooked 

 toward the end, gray-green: spine stoutly conical, gen- 

 tly recurved, narrowly grooved below the middle, scarcely 

 decurrent: teeth narrowly triangular, hardened into the 

 tops of fleshy prominences between which the margin is 

 more or less concave. 



The most frequently planted Agave, in Guatemalan 

 parks represented by the white- or yellow-margined va- 

 riety, var. marginata. 



Agave picta Salm. 



Differing from A. americana marginata in its darker 

 green leaves and slender acicular straight spine. 



The unvariegated form of this, which occurs about 

 the Mediterranean from seeds of the variegated form, 

 has been called A. ingens by Mr. Berger : it is not known 

 elsewhere. 



The variegated form is sparingly cultivated in Guate- 

 mala, — e. g. about the railroad yards in the capital. 



SYNOPSIS OF GUATEMALAN FURCRAEAS. 



Leaves rough-margined but without large teeth, glau- 

 cous, striate-roughened. Caulescent. — Serrulatae. 



Tall tree. Flowers pubescent. F. longaeva. 



Scarcely 2 m. high. Flowers glabrous. F. quicheensis. 



Leaves smooth-margined, toothed, green or little glau- 

 cous, not striate. Often acaulescent. — Eufurcraea. 



Teeth usually confined to the lower third of leaf. F. samalana. 

 Toothed throughout. 



Teeth red or brown, rather distant. Leaves flattish. 



F. guatemalensis. 

 Teeth blackish, close together. Leaves very concave. 



F. melanodonta. 



