Chase — Notes on Genera of Paniceve. III. 187 



Grisebach's description is inaccurate in regard to the inflorescence, which 

 he describes as staminate and pistillate mixed, terminal pistillate. The 

 staminate and pistillate racemes are distinct in the type as in the other 

 specimens seen, but the two lie so closely together that they might be 

 mistaken for one unless examined carefully. 



Flowering culms slender 4 to 7 cm. high, equaling or shorter than the 

 sterile stems, the inflorescence short-exserted, the racemes erect, 1 to 3 

 cm. long, about equal; pistillate spikelets 3.5 mm. long, the glume and 

 sterile lemma glabrous, exceeding the fruit which is entirely clothed with 

 white silky hairs; staminate spikelets scarcely one-half as long as the 

 pistillate, glabrous. The sterile stems less delicate than in the preceding, 

 blades firmer, pale green, triangular ovate, minutely pubescent on both 

 surfaces, ciliate on the margins. Besides the type, specimens of Wright, 

 3435 have been examined in the National Herbarium, Gray herbarium, 

 herbarium of Columbia University, and in the Sauvalle herbarium. This 

 species was collected by Caldwell and Baker (no. 7011) at San Diego de 

 los Banos, Cuba, the only known collection since ^Wright's. 



Genus AMPHICARPON, Raf. Jan. 1818, Am. Month. Mag. 2 : 175. 



" His [Pursh's] Milium amphicarpon must probably form a new genus 

 Amphicarpon Raf." The foregoing occurs in Rafinesque's review of 

 Pursh's Flora of North America. No generic characters are given and 

 it is evident Rafinesque had not seen the species upon which he bases his 

 genus, but technically the above constitutes publication. 



Milium amphicarpon Pursh 1814, Fl. 1 : 62. pi. 2. " New Jersey near 

 Egg-Harbour. ' ' The plate represents a specimen with a narrow terminal 

 panicle and numerous large spikelets on slender branches from the base 

 of the culm. The type is in the herbarium at Kew. The name " Milium 

 Amphicarpum " and "Herb. Pursh propr " are written on the sheet, 

 and on the back is written " N. America, Fred. Pursh." 



Pursh gives a good description of " this singular grass" but his state- 

 ment: " Flores feminei in scapis radicalibus unifloris basi vaginatis," is 

 inaccurate in that these spikelets are perfect and cleistogamous. 



Amphicarpum Kunth 1829, Rev. Gram. 1 : 28. 



" Spiculae biflorae (flore inferiore unipaleaceo, neutro glumae simil- 

 limo), masculae et femineae in eadem planta; hae radicales, longe 

 pedunculatae ; illae terminates, paniculatae. 



" Masc. : Gluma unica (altera inferior nulla), membranacea, concava, 

 mutica. Paleae floris masculi duae, longitudine glumae, subaequales, 

 chartaceae, concavae, muticae; inferior superiorem binerviam amplec- 

 tens. * * * Stamina tria. Ovarium effetum. Fern: Gluma unica, 

 membranacea, multinervea, concava, mutica, paleis vix brevior. Paleae 

 floris feminei duae coriaceae, acutatae; inferior superiorem binerviam 

 amplectens. * * * Stamina effeta. Ovarium glabrum. Stigmata duo, 

 terminalia, sub-sessilia, plumosa; * * * Caryopsis oblonga, teretiuscula, 

 glabra, libera, paleis inclusa. Gramen caespitosum. * * * Panicula 

 ramis simplicibus; spiculis pedicellatis, racemosis, cum pedicello con- 



