﻿256 



MISSOURI BOTANICAL GARDEN. 



decurrent along a short quadrate channel, while it stops ab- 

 ruptly in the latter, which is one of the "Sisalanae." The 

 present description, from very scanty material, may serve 

 for its differentiation from its geographic associates only. 



EXPLANATION OF PLATES. 

 Plate 18.— Agave macroacantha, one specimen with denuded old panicle, 

 at the northern side of the Cerro Colorado, Tehuacan, August^l903. ^ 



side of the Cerro Colorado, Teliuacan, August 1903. Below, two specimen 

 plants grown at the Missouri Botanical Garden as A. Besseriana, 1887. 



Plate 20— Agave macroacantha in an early stage of flowering. One of 

 the Missouri Botanical Garden plants of A. Bessermrm, JiUy 1906. 



Plate 21.— Agave macroacantha. The same plant, bearing numerous 

 bulbils after flowering, autumn of 1906. 



Plate 22.— Agave macroacantha. Apex and base of leaf of the same gar- 

 den plant, July 1906, natural size. 



Plate 23.— Agave macroacantha, in fruit, on the hills above Mexia, Feb- 

 ruary, 1905. 



Plate 24. — Agave macroacantha. Flowers, partly grown capsule, and 

 young bulbils of the Missouri Botanical Garden plant, 1906, natural size. 

 Plate 25.— Agave macroacantha. Capsiiles, seeds and seedlings of the 



Plate 26.— Agave macroacantha'? Agave pugioniformis of the Munich Bo- 

 tanical Garden, June 12, 1853, natural size.— Obligingly photographed by 

 Professor Radlkofer in 1906. 



Plate 27.— Agave macroacantha latifolia, west of Tehuacan, February 

 1905. 



Plate 28. — Agave macroacantha latifolia, showing spines and marginal 



Plate 2^.— Agave Karvnnskii, before the Cerro Colorado back of La 

 Huerta, near Tehuacan, August 1903. 



Plate 30.— Agave Kai-vnmku, near Mitla — Photographed by Professor 

 MacDougal in September 1906. 



Plate 31.— Agave KanrinskH Capsules, from Tehuacan. Rose & Rose, 

 no. 11262, natural size. .1. rubescens.> Seed, from Mitla road, natural size. 



Plate 32.— Agave rzibesccns. Young plant from El Parian, cultivated at 

 the Missouri Botanical Garden, 1907. 



Plate 33.— Agave rubescens. Below, leaves of the young garden plant. 



Plate 34.— Agave rubescenl SpSi^andmarginof leaf fromnearTehuacan, 



