130 Chase — Notes on Genera of Panicece. TV. 



tion identifies the species with that descrihed as Paspalum immersum Nees. 

 In this species and its close allies the 3-angled rachis is about 1.5 mm. 

 wide, the margins and midrib bearing stiff golden hairs arising from 

 papilhe, a few hairs also at the side below the spikelet, but not bearing a 

 fascicle of hairs beneath the spikelet as in Axonopus annus. The spike- 

 lets in Cabrera chrysobl&pharis fit into shallow depressions in the rachis, 

 the effect of an excavation being heightened by the surrounding pilifer- 

 ous papilla'. In .1. aureus, to which Lagasca's species has been referred 

 by many authors, and its close allies, the narrow rachis is filiate on the 

 margin (not down the center also as in Cabrera chrysoblepharis) , and 

 below each spikelet, "in the form of an involucre," as Beauvois says, 

 is a fascicle of bright golden hairs exceeding the spikelets which are not 

 sel in excavations of the rachis. Nees (Agrost. Bras. 78. 1829) includes 

 Axonopus aureus Beauv. ( under the name Paspalus immersus* to which he 

 refers .1. aureus as a synonym) and allied species under Paspalum 

 "Sectio VI. Axonopodes." Apparently he failed to note that in these 

 species as well as in Paspalum compressum and its allies, of which he 

 makes "Sectio I. Digitariae," the solitary spikelets are in the reversed 

 position. Nees refers "(Jen. Cabrera Lag." to this section Axonopodes. 

 Lagasca's species, C. chrysoblepharis, he refers as a synonym to his own 

 Paspalus exasperatus." 



Anastrophus Schlecht. Bot. Zeitschr. 8 : 681. 1850. The author discusses 

 Paspalum section Digitariae "(spiculis Lnversis)" of Nees and proposes a 

 generic name for it. He lists under this genus the names of eight species, 

 three of them unpublished herbarium names. The first of the species 

 (all of which are included in the section Digitariae by Nees) is Paspalum 

 platyculmum Thou. This species, which we take as the type, was described 

 by Nees (Agrost. Bras. 24. 1829) from a specimen bearing this name in 

 the Willdenow Herbarium. We have not seen the specimen, which was 

 collected in "insula S. Mauritii," hut Nees' description shows it to be 

 closely related to Axonopus compressus. Schlechtendal does not himself 

 form any binomials under Anastrophus. Index Kewensis (1 : 118. 1893) 

 transfers all names, including noinina nuda, mentioned by Schlechtendal 

 in his paper. Schlechtendal does not here make any mention of 

 Axonopus, but in a later paper (Linnaea 26:532. 1853), discussing 

 Axonopus beauv., he remarks that he has already established Anastrophus 

 and has thereby begun the destruction of the genus Axonopus of Beauv., 

 and that now Cabrera Lag. must he separated from it. [Since Nees did 

 not mention the reversed position of the spikelets in this group, as he 

 did in the group Schlechtendal named Anastrophus, neither does Schlech- 

 tendal note this character, although when discussing Anastrophus he 

 laid great stress upon it.] 



Hackel (Engler & Prantl, Pflanzenf. 2 : 2 35. 1887) makes Anastrophus 

 liis third section of Paspalum, noting that the lower glume and lemma 

 are turned from the axis. Nash (Small, Fl. Southeast. I". S. 79. 1903) 

 recognizes Anastrophus as a genus. 



* Nees uses throughout the masculine form of this name. 



