594 ADDITIONS AND CORRECTIONS 



Page 44. Next after Digitaria saxguinalis, insert 

 2.* D. glabra, R. & S. Leaves and sheaths smooth ; spikes 2 or 3, 

 digitate, sub-alternate ; spikelets lance-ovoid, a little crowded, pubes- 

 cent ; glume as long as the abortive floret Beck, Bot. p. 398. Specim. 

 Gray, Gram. 1. no. 22. 

 D. paspalodes. Mx. Am. I. p. 46. Purth, Am. 1, />. 70. jVutt. Gen. 



1. p. 56. 



D. humifusa. Pers. Syn. I. p. 85. 



D. ischtemum. Muhl. Catal.p.Q* Ejusd. Gram. p. 131. 



Smooth Dioitaria. 



Root annual. Culm C to 12 inches long, decumbent, or often quite prostrate, 

 and spreading, rarely radicating at the joints ; joint* smooth. Leaves short (1 to 

 2 inches long, flat, smooth, or sparingly pilose on the upper surface ; sheaths stri- 

 ate, smooth, contracted and a little hairy at throat. Spikes seldom more than 3 

 (often 2), 1 to 3 inches long ; rachis flat, margined, flexuose, striate, minutely scab- 

 rous. Spikelets mostly dark purple, or greenish-purple, lance-ovoid, somewhat 

 compressed, on short pedicels, alternate in 2 rows on one side of, and appressetl 

 to, the rachis. Inferior glume wanting. Palea of the abortive jloret 5-nervcd, 

 pubescent. 

 Hab. Cultivated lots ; Indian-corn fields : frequent. Fl. Aug. Sept. F r. Octo. 



Obs. This had been over-looked, as a var. of D. sanguinalis— to which it has 

 considerable resemblance at first sight ; but may be readily distinguished on com- 

 parison. I collected it in 1833. It is usually quite prostrate, smooth, and much 

 tinged with dark purple on the upper side,-paler or green on the side next the 

 earth. 



Page 56. Agrostis lateriflora, &c. After a closer observation, 

 and more mature reflection, I incline to think that it might be a* 

 well to distribute our American species of Agrostis according to the 

 arrangement adopted by Dr. Gray. 



Page 58. Line 32 from the top, for « finally lacerate,'' read finely 

 lacerate. 



Page 67. Line 6 from the bottom, for "Common Ayena," read 

 Cultivated Avena. 



Page 86. Line 9 from the top, for "Common Tiuticum," read 

 Cultivated Triticum. 



Page 97. Line 5 from the bottom, for « bipartite," read bipartite. 



Page 105. After Hedtotis ccerulka, insert 



2. H. longifolia, Hook. Stem branching, 4-angled ; leaves lancc- 

 linear, or oblong, the radical ones attenuated at base ; stipules broad- 

 ovate, entire, or 2 or 3-toothcd, membranaceous; flowers mostly in 

 threes, terminal and subterminal, corymbose ; corolla funnel-form. Hook: 



Jim. 1. p. 286. 



Houstonia longifolia. Willd. Sp. I. p. 583. Muhl. Catal.p. 15. J\utt. 

 Gen. 1. p. 95. Ell. Sh. 1. p. 192. Bigel. Bost. p. 53. Torr. F.l. 

 p. 173. Ejusd. Con.p.p. 81. Beck, Bot. p. 243. Eat. Man. p. 178. 

 H. angustifolia. Mx. Am. I. p. 85. Pers. Syn. 1. p. 125. Pursh, 



Jim. I. p. 106. 

 Losg-lsaved Hedtotis. 



