Wy CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
ing a 3-valved calyx and lacking awns and involucre. But it is 
clear from the note that Linnzus here also referred to the genus 
Panicum those species in which the spikelet is awned and those with 
an involucre. It is true he refers to the corolla valves as being awned, 
but this is apparently an error, and originated from a misinterpreta- 
tion of Scheuchzer’s figure % of Echinochloa crusgalhi. 
As stated above the genus Milium, as described in the first edition 
of Linneus’s Genera Plantarum, is based on the species now called 
Panicum miliaceum Il. and is taken directly from Tournefort’s work. 
The calyx is described as 3-valved. In the next three editions of the 
Genera Plantarum, Linneus still cites Tournefort as the author of 
Milium and refers to his plate 298, but he changes the diagnosis to 
read, calyx 2-valved, and adds the note that Milium with a 2-valved 
calyx differs from Panicum with a 3-valved calyx. The genus 
appears in the fifth and sixth editions as in the preceding three edi- 
tions, except that the last-mentioned note is omitted. 
The treatment of the two genera in the Species Plantarum ® is 
in accord with that in the fifth edition of the Genera Plantarum. 
Under Panicum twenty species are described, divided into two 
groups, Spicata and Paniculata. The species are as follows: 
SPICATA. 
1. P. alopecuroid[esj=Pennisetum caffrum(Bory) Leeke. 
Munro ¢ states that the specimen in the Linnean Herbarium is 
Gymnothria thouaru. Beauv., which species is referred by Leeke@ as 
above. This is a different species from Pennisetum alopecuroides 
Desv.¢ or Pennisetum alopecuroides Spreng.,/ which is based on Cen- 
chrus alopecuroides 'Thunb. 
2. P. glauceum =Chaetochloa glauca (L.) Scribn. 
P. glaucum 8 =Chaetochloa viridis (L.) Scribn. 
P. glaucumy =Chaetochloa glauca (.) Scribn.g 
3. P. americanum=Pennisetum americanum (L.) Schum. 
4, P.italicum =Chaetochloa italica (L.) Scribn. 
5. P.crusgalli =Echinochloa crusgalli (L.) Beauv. 
P. crusgalli 8 —=Echinochloa crusgalli (L.) Beauv. The long-awned form. 
6. P. dissectum =Paspalum dissectum L. ° 
7. P. dimidiatum =Stenotaphrum dimidiatum (L.) Brongn. 
8. P. sanguinale =Syntherisma sanguinalis (.) Dulac. 
9. P. filiforme =Syntherisma filiformis (L.) Nash. 
10. P. compositum=O plismenus compositus (.) Beauv. 
a Agrost. pl. 2.7. 2. FF. 1719. 
®L. Sp. Pl. 55. 1753. 
¢ Proc. Linn. Soc. Bot. 6: 37. 1862. 
4 Zeitschr. Naturwiss. 79: 39. 1907. 
é Hamilt. Prodr. Pl. Ind. Occ. 11. 1825. 
FSyst. Veg. 1: 303. 1825. 
9 For a further discussion of the Linnzean species based upon American plants, see 
Hitchcock, Contr. Nat. Herb. 12: 114. 1908. 
