‘ 
88 _ FRIANDRIA. DIGYNIA: 
_ scabrous. Calix smooth, nerveless,-exterior valve in the 
outer flowers setaceous fronta its base,the inner Valves ob- 
liquely dilated, and rigidly coriaceous, all awned, the in- 
ner divisions of the lateral flowers, appearing nearly hae 
. Mi-ovate, the central ones sublanceolate, Corolla nerve- 
less, the inner valve furnished with a short awn, arising 
- from its base. Nearly allied, apparently, to the H. mar? 
 timum. 
On the arid and saline plains of the Missouri. 
> . 3. jubatum. On the calcareous islands of Lake Huron 
and Michigan, also on the banks of the Missouri. 
The genus Hordeum exists chiefly in Europe, e extend- 
ing into Northern Africa, and Tartary in Asia. The 2 
Species above described are natives of North America, 
and the &. jubatum i is also common to Smyrna. 
120. SECALE. L. (Rye.) | 
 Calia 2-valved, valves opposite, or 1-valved 
and many-flowered; glumes linear-lanceolate, 
smooth, or channelled on either side; exterior 
valve terminated by a long awn.— Flowers 
spiked, rachis toothed. 
Species. 1. S. cereale. Cultivated... No where natu- 
ized or eens in the United States. Native in the 
“ 
TRITICUM. L. L. (Wheat.) 
Calix 2-valved, solitary, say ibe wered; : 
valves parallel to the rachis. Flowers some- 
what obtuse, glumes unarmed, or interruptedly 
awned. Spikelets rather short, or eating 
_ on the sides of a flat rachis. 
. Species. 1. T. sativum. Cultivated. of this i impor- 
ies there are 3 well known varieties, as o. «sti- 
1 Spring-wheat). B. hybernum (autumnal or winter- 
t). ¥- durum, with the culm solid, and the seed hard, 
affording but little farina. “This worthless variety is - 
: the only one cultivated throughout Barbary. The. ihe 
? _ place of | this species, as well as the 7° polonicum and 7. 
Spelta, c2n now no longer be ascertained; still it appears 
2 a sist the 7. sativum deremagale in Egypt, th eee. 
