106 J- Schuster. — Gycadaceae. 



Gen. Suppl. II. (1842) add. 103. — Arthrozamia Reichenb. Gonsp. (1828) 40 sine descript. 

 — Zamiae spec. Jacq. Fragm. (1809) t. 25 — 29; Gaertn. Fruct. I. (1788) t. 3. 



Strobilus <J cylindricus vel oblongo-cylindricus. Microsporophylla aut undique 

 aut utroque latere nervi ventralis subtus loculigera, cuneata, parte sterili apicali 

 rhombeo-tetragono- vel hexagono-peltata, interdum apophysata. Strobilus 5 ovoideus 

 vel oblongo-ellipsoideus. Macrosporophylla pedunculato-peltata, biovulata, rhom- 

 boidea, pyramidato-truncata vel apophysoidea, utroque latere interdum paulum 

 hamata vel lobato-squamosa et semina plus minus obtegentia. Macrosporangium 

 ovatum, strato carnoso nonnunquam prolongato. Putamen costatum, striatum vel 

 glabrum. — Truncus humilis vel altus, cylindricus, ellipsoideus vel subglobosus. Folia 

 pinnatisecta, vernatione rhachis et segmentorum stricta, imbricativa. Foliola parallele 

 multinervia, nervis tenuiter striolatis vel striolato-prominentibus vel subtus distincte 

 prominentibus, linearia, lineari-lanceolata vel lanceolata, integra, dentata vel spinoso- 

 dentata, breviuscula vel elongata, attenuata vel acuta, basi partim torta vel contracta, 

 margine integro vel subrevoluto. 



Species 14, africanae. 



Gonspectus specierum. 



A. Truncus humilis, cylindricus. Foliola linearia, acumi- 

 nata, nervis subtus distincte prominentibus, margine 

 integro, revoluto. Strobilus <J cylindricus. Microsporo- 

 phylla obtuse-cuneata, parte sterili rhombeo-hexagono- 

 peltata. Strobilus § ovoideus. Macrosporophylla utro- 

 que latere paulum hamata, parte sterili triticeo- 

 tomentosa rhomboidea. Macrosporangium ovatum, 

 aurantiaco-rubrum Sect. I. Monoaustrales. 



1. E. cycadifolius . 



B. Truncus subglobosus vel cylindricus, humilis vel altus. 

 Foliola nervis subtus striolato-prominentibus, margine 

 subrecurva. Strobilus <J oblongo-cylindricus, lutescens. 

 Microsporophylla late cuneata. Strobilus $ ovoideus. • 

 Macrosporophylla pyramidato-truncata Sect.- II. Polyaustrales. 



a. Foliola breviuscula, basi torta, lanceolata, integra 

 vel denticulata. Pelta strobili <J rhomboidea, sub- 

 convexa. Macrosporophylli pars sterilis apophy- 

 soidea. Macrosporangium oblongo-ovatum .... Subsect. 1. Microphylli. 

 a. Foliola breviuscula, basi torta, lanceolata, apice 



mucronulato, integra vel 1 — 2-denticulata, sub- 

 revoluta, nervis subtus striato-prominulis. Stro- 

 bilus <J ovatus. Microsporophylla cuneato-trun- 

 cata. Pelta strobili <J rhomboidea, subconvexa, 

 inferiorem apophyseos partem plus quam dimi- 

 diam amplectens. Strobilus $ ovoideus. Pars 

 sterilis macrosporophylli apophysoidea, striato- 

 rugosa, apice tuberculato-rugoso, excrescentia 

 lateralis squamaeformis tuberculata, semen ad 

 dimidium obtegens. Macrosporangium oblongo- 

 ovatum, rubrum 2. E. caffer. 



b. Foliola lanceolata vel elongata, basi contracta, in- 

 tegra vel dentata. Microsporophylli pars sterilis 

 truncato-pyramidata vel rhomboideo- hamata vel 

 rostrato-truncata vel apophysoidea. Macrosporan- 

 gium oblongum vel ovoideum, strato carnoso elon- 



gato. Putamen tenuiter striatum vel glabrum . . Subsect. 2. Macrophylli. 



