88 BOTANICAL GAZETTE [januar-k 



Macroglossum} There can be no doubt, therefore, that the genus 

 is closely related to MaraUia on the one hand, while on the other 

 it is nearly allied to Archangiopteris. It represents presumably a 

 form of an ancient and conserved type connecting MaraUia with 

 Archangiopteris. 



Protomarattia, nov. gen. — Rhizoma dorsiventrale oblique vel 

 horizontaliter prostratum, reliquiis stipitum dense obtectum, 

 radicibus e latere ventrali oriundis. Folia circum rhizoma spirali- 

 ter disposita ; stipulis e latere adaxiali stipitis commissura connexis ; 

 stipitibus rectis duobus locis basi et superiore geniculato-incras- 

 satis post finitas functiones e geniculo superiore et iterum basilari 

 solutis; frondibus simpliciter pari- vel impari-pinnatis, pinnis 

 patentibus vel interdum retrorsum refiexis; petiolulis pinnarum 

 incrassatis. Synangium lineare submarginale e margine pinnae 

 4-6 mm. distans subsessile rima mediana longitudinali apertum; 

 indusio e squamis numerosissimis laceratis inprimis constituto, 

 demum evanescenti. 



Differt a MaraUia synangio lineari nee ovali, loculis multo numerosioribus, 

 fronde multo minore simplicter nee pluries pinnata et rhizomate dorsiventrali 

 repente nee ereeto; differt a Archangiopteris synangio. 



In Tonkin incola ad hue monotypica. 



Protomarattia tonkinensis, sp. nov. — Rhizoma incrassatum 

 horizontaliter vel oblique repens dorsiventrale, in specimine exsic- 

 cato nostro 15 cm. longum cum rehquiis foliorum 2.5 cm. latum, 

 reliquiis stipitum et stipulis dense obtectum e latere ventrali radices 

 incrassatas teretes emittens. Folia versus apicem rhizomatis 5-6 

 approximatim disposita. Stipites 30-40 cm. longi erecti plano- 

 convexi in sectione duobus locis ad basin et ad 0.3 altitudinem a 

 basi geniculato-incrassati, basi dense sursum pauce squamulati, 

 squamuKs lanceolatis vel hnearibus circ. 2 mm. longis margine 

 erosis; partibus incrassatis basilaribus geniculiformibus 2.5 cm, 

 longis, 1 . 5 cm. latis utroque latere stipula et latere adaxiali com- 

 missura instructis, stipulis coriaceis tenuiter 2-lobatis, lobis abaxi- 

 alibus (anterioribus) minoribus late semirotundatis, i cm. latis, 

 7 mm. longis margine erosis et membranaceis folium proprium (in 



8 Campbell, D. H., The structure and affinities of Macroglossiim Alidae Cope- 

 land. Ann. Botany 28:664. 1914- 



