Zamia. 133 



folium (Trew) O. Kuntze, Rev. gen. II. (1891) 803. — Palma-Filix Adans. Farn. pl. 

 IL (1763) 21. — Cycas Todda-Pana Adans. Farn. pl. IL (1763) 21. 



Strobili <J cylindrici vel cylindrico-elongati, interdum plures. Microsporophylla 

 pedicellato-peltata vel cuneiformi-peltata, microsporangia sub pelta disposita, in 

 duabus areis segregata vel confluentia vel utroque latere in duas series marginales 

 disposita, vel ad numerum 4 — 5 reducta, superiora sterilia interdum subcoalita. Peltae ■ 

 truncato-pyramidatae, quadrangulo-hexangulares vel hexagonae. Strobilus $ cylin- 

 dricus, ovoideo-elongatus vel obtusus. Macrosporophylla pedicellato-peltata, subtus 

 biovulata. Peltae transverse hexagonae vel subquadrangulares, in medio concavatae, 

 planae vel altius prismatice productae. Macrosporangia ovata vel subtrigono-ovata, 

 rubiginosa, aurantiaca, flava vel albida. — Truncus hypogaeus, humilis vel erectus, sub- 

 conicus, cylindricus vel tuberosus, simplex vel dichotome ramosus. Gataphylla acumi- 

 nata, integra vel apice dentata. Petioli aculeati vel inermes. Rhachi vernatione apice 

 recta imbricativa vel levissime incurva. Foliola basi articulata vel petiolulata, nervis 

 parallelis, subtus costato-prominentibus vel prominulis vel tenuibus striata vel nervis 

 vix prominulis, integra vel ad apicem denticulata, serrulata, spinulosa vel sinuata, 

 linearia, lanceolata, elliptica, obovata vel cuneata, acuminata, attenuata vel obtusius- 

 cula, interdum leviter curvata. 



Species 26, americanae." 



Conspectus specierum. 



A. Truncus semi-hypogaeus vel erectus, cylindricus 

 vel subconicus. Foliola nervis subtus prominulis 

 striata. Strobilus <J cylindricus vel cylindrico- 

 elongatus. Peltae truncato-pyramidatae vel hexa- 

 gonae. Strobilus § cylindricus vel obtusus. Peltae 



hexagonae vel altius prismatice productae . . . Sect. I. Central! -meridionales. 

 a. Truncus prostratus vel erectus, humilis vel altus, 

 cylindricus vel subconicus. Foliola nervis pro- 

 minulis striata, integra vel ad apicem denti- 

 culato-serrulata. Strobilus $ cylindricus, 

 pedunculo longior. Peltae truncato-pyrami- 

 datae, subaequaliter hexagonae. Microsporo- 

 phylla utramque per aream nervo medio dis- 

 cretam fertilia, longiora quam latiora. Stro- 

 bilus ^ cylindricus, breviter pedunculatus. 



Peltae longiores quam latiores Subsect. 1. Nervistriolatae. 



a. Foliola falcato-lanceolata, longe acuminata 1. Z. acuminata. 



Accedit • la. Z. cupatiensis. 



ß. Foliola subfalcata ovato-lanceolata, oblique 

 acuminata, peltae strobili $ cano-farinosae, 

 peltae strobili $ cinereo-tomentosae, macro- 

 sporangia coccinea 2. Z. Tuerckheimii. 



y. Foliola ovata, oblique acuminata, peltae 



strobili $ pallide brunneo-tomentosae . . 3. Z. obliqua. 



d. Foliola late lanceolata, sensim angustata, 



peltae strobili <$ griseo-brunneo-tomentosae 4. Z. V erschaff eltii. 



e. Foliola lineari-lanceolata, sensim cuspidata, 

 peltae strobili <$ flavido-brunneo-tomen- 

 tosae, peltae strobili $ ferrugineo-tomen- 



tosae, macrosporangia aurantiaca .... 5. Z. Lindenii. 

 £. Foliola lanceolata, apice attenuata ... 6. Z. Poeppigiana. 

 r\. Foliola late obovato-lanceolata, abrupte 



