136 J. Schuster. — Cycadaceae. 



latiores quam longiores ferrugineo-tomentosae. 

 Strobilus $ ovali-cylindricus. Peltae strobili $ 

 transverse ovali-sexangulae, in medio transverse 

 concavatae,castaneo-brunneae.Macrosporangia 



trigono-applanata, aurantiaco-rubiginosa . . Subsect. 1. Floridanae. 



22. Z. floridana. 



b. Truncus pusillus, hypogaeus, tuberosus vel 

 fusiformis. Foliola nervis vix prominulis, 

 margine subrevoluto, obtusiuscula. Strobilus 

 (J cylindricus, pedunculo duplo longiore quam 

 strobilus vel breviore. Peltae strobili <J hexa- 

 gonae, transversim centricavatae. Strobilus $ 

 ovoideus vel late cylindricus, pedunculo bre- 

 viore vel paulo longiore quam strobilus. Peltae 



strobili $ hexagonae, latiores quam longiores Subsect. 2. Cubanae. 

 a. Foliola obovato-cuneata vel spathulata, 



peltae strobili (Jbrunneo-tomentosae, macro- 



sporangia ellipsoidea vel subglobosa, lutes- 



centia 23. Z. pygmaea. 



ß. Foliola dorsiventrali-elliptica, paulum acu- 



minata, peltae strobili <J fusco-tomentosae, 



macrosporangia ovalia, rubicunda .... 24. Z. Chamberlainii. 



c. Truncus parvus vel humilis, partim hypogaeus, 

 cylindricus, ellipsoideus vel subglobosus. Foli- 

 ola nervis paulum prominentibus, margine 

 revoluto vel subrevoluto. Strobilus <J cylin- 

 dricus, pedunculum aequans vel superans. 

 Peltae strobili <J transversim quadrangulo- 

 hexangulares, angulis ex parte rotundatis. 

 Strobilus $ oblongus, pedunculo breviore. 

 Peltae strobili $ planae, inaequaliter quadran- 



gulares vel transversim hexagonales Subsect. 3. Antillanae. 



a. Foliola lineari-lanceolata vel oblongo-cune- 

 ata, sensim acuminato-rotundata, peltae 

 strobili <J brunneo-tomentosae margine gri- 

 seo, peltae strobili £ brunneo-fuscae vel 

 in griseum vergentes, macrospqrangia sub- 

 trigono-ovata, minute apiculata, cerasina . 25. Z. media. 



ß. Foliola anguste linearia, obtusiuscula, pel- 

 tae strobili <J fusco-tomentosae margine 

 griseo, peltae strobili $ fusco-tomentosae, 

 macrosporangia ovato-subglobosa .... 26. Z. angustifolia. 



Sect. I. Centrali-meridionales Schuster. 



1. Z. acuminata Oersted ex Dyer in Hemsl. Biol. Gentr. Americ. Bot. XVI. 3. 

 (1883) 194. — Folia jugo-pinnata, alterna vel opposita. Petiolus sparsim aculeatus, 

 triqueter, glaberrimus. Foliola utroque latere ad 7 — 8, late falcato-lanceolata, apicem 

 versus subito longe caudato-acuminata, acumine 4,5 cm longo, basi subito maxime 

 angustata, ad insertionem 2 mm lata, utrinque integerrima, margine anadromo fere 

 recto vel levissime concavato, catadromo valde concavo lintriformi, membranacea, 

 flexibilia, laete viridia, nervis 30 — 32 partim dichotomis prominulis 1 mm distantibus, 

 26 cm longa, 4,3—4,5 cm lata. 



Nicaragua: am Fluß San Juan (Oersted I. 1848 — Herb. Berol.). 



