Trelease — The Agaveae of Guatemala. 151 



EXPLANATION OF ILLUSTRATIONS. 



Plate VI. — Agave tortispina. Above, the type at Cruz, Guatemala, 

 with a small planted specimen of A. sisalana in the background, Xl/7. 

 Below, spines and margin from the type (Trelease, 1), natural size. 



Plate VII. — Agave pachycentra. Above, the type at Cruz, Guatemala, 

 Xl/10. Below, spines and margin from the type (Trelease, 2), natural 

 size. 



Plate VIII. — Agave Hurteri. The type plant and two other flower- 

 ing specimens, in the Samala valley at Zunil, Guatemala, Xl/50. 



Plate IX. — Agave Hurteri. Above, a panicle branch, showing the 

 congested flowers characteristic of the Guatemalenses, Xl/3. Below, 

 split and entire flowers, natural size. Both from the type (Trelease, 3). 



Plate X. — Agave Hurteri. Spines, leaf-margin, capsules and seeds, 

 from the type (Trelease, 3), natural size. 



Plate XI. — Agave Seemanniana. Apex, margin and additional spines 

 of the Guatemalan plant taken for this species (Beam, 6154), natural 

 size. 



Plate XII. — Agave Thomasae. Above, the type plant, at the Hotel 

 Thomas, Quezaltenango, Guatemala — with a young plant of A. ameri- 

 cana marginata in the foreground, Xl/15. Below, spine and prickles 

 of the type (Trelease, 19), natural size. 



Plate XIII. — Agave Deamiana. Above, representative plant, at Fis- 

 cal, Guatemala (Beam, photograph 6199), Xl/15. Below, apex and mar- 

 gin of the type (Beam, 6154 a), natural size. 



Plate XIV. — Agave minarum. Type sheet, reduced; and flowers of the 

 type (Kellerman, 5129), natural size. 



Plate XV. — Agave tenuispina. Type sheet, reduced; and spines and 

 leaf-margin of the type (Trelease, 4), natural size. 



Plate XVI. — Agave opacidens. Above, spines and leaf-margin. Be- 

 low, dried flowers, capsules and seeds. Both from the type (Trelease, 

 5), natural size. 



Plate XVII. — Agave sicaefolia. Above, the type clump at El Rancho, 

 Guatemala. Below, spines and leaf-margin from the type (Trelease, 

 6), natural size. 



Plate XVIII. — Agave Keller maniana. Type sheet, reduced; and 

 spine and leaf -margin of the type (Beam, 6239), natural size. 



Plate XIX. — Agave samalana. Above, the type group of plants, 

 X 1/100. Below, a representative plant, Xl/20. Between Zunil and Sta. 

 Maria, in the Samala valley, Guatemala. 



Plate XX. — Agave samalana. Above, spines and leaf-margin, from 

 the type (Trelease, 7). Below, shriveled flowers, capsules and seeds, 

 from the type (Trelease, 9). Both natural size. 



Plate XXL — Agave lagunae. Above, the type plant on a gravelly 

 slope above Amatitlan, Guatemala, Xl/10. Below, spines and leaf- 

 margin from the type (Trelease, 10). Both natural size. 



