156 
BOTANY. 
geniculate ; upper palea hairy at the tip. Stamen solitary. No. 2030 of Hartweg’s Californian 
collection is the same grass as this. 
A vena fatua, Linn. Spec. p. 118; Kunth , Enum. 1, p. 302. Hills and plains, Feather Eiver ; 
Benicia, &c. April and May. This is the common wild oat of California. It may have been 
introduced hy the Spaniards; hut it is now spread over the whole country, many miles from the 
coast. 
Tricuspis mutica (n. sp.) : cmspitosa, glabra; culmo simplicissimo erecto ; foliis convoluto- 
filiformibus ; panicula terminali longe exserta racemosa, ramis hrevibus oligostachyis ; spiculis 
teretiusculis 5-8 floris ; palea inferiore mutica integra vel bifida, margine dorsoque longe ciliata. 
Laguna Colorado, New Mexico ; September. About a foot high, growing in tufts. Boot 
perennial. Culm rigid terete. Leaves 3-6 inches long. Panicle about 3 inches long, the 
short appressed bearing 3-5 spikelets. Glumes unequal 1-nerved, rather acute, scarcely half 
the length of the spikelets. Inferior palea (after flowering) usually more or less deeply notched, 
otherwise entire ; or when old slightly toothed or eroded ; the midnerve not at all produced into 
a mucro, and the lateral suhmarginal nerves scarcely reaching to the summit; the long white 
hairs confined to the lower half of the nerves. Superior palea one-third shorter than the 
inferior, notched at the apex, plumose on the margin. Stamens 3 ; anthers oblong. Styles 
short, stigmas plumose, purple. Caryopsis oblong, concave on the inner face, finely striated 
longitudinally. 
Tricuspis pulchella. Uralepis pulchella, Kuntli, Enum. p. 108, and Suppl. p. 274. Tri- 
chodia pulchella II. B. K. Nov. Gen. 1, t. 47. Gravelly hills, near Albuquerque, New Mexico ; 
October. A beautiful little grass with densely cmspitose culms and few-flowered panicles, which 
are crowded among the fasciculate leafy branches. It occurs along the Eio Grande, and south¬ 
ward to Mexico. The root appears to be annual, but Kunth says that it is perennial. 
Tricuspis purpurea, Gray, Man. Bot. ed. 2, p. 556. Uralepis purpurea and U. aristulata, 
Nutt. Gen. 1 ,p. 62. Wet ravines, Elm creek, Indian Territory; August. 
Eragrostis Purshii, Schrad.; Gray , Man. ed. 2, p. 564. Poa pectinacea, Pursh, FI. 1, p. 
81, non Miclix. Sandy soils on the Eio Grande, near Albuquerque ; October. 
Eragrostis tenuis, Gray , l. c. Poa tenuis, Ell. Sic. 1 ,p. 156. Prairies, and along streams, 
Upper Cross Timbers of the Canadian; August. E. Frankii, Mey., scarcely differs, except 
in the smaller number of flowers in the spikelets. 
Eragrostis oxylepis, Torr. in Marcy’s Bep.p. 301, t. 19, (sub Poa.) Poa interrupta, Nutt, 
in Trans. Amer. Phil. Soc. n. ser. 5, p. 146, non Both, nec B. Br. Sandy ravines, near the 
Canadian river. Spikelets larger than usual, and some of them 30-40 flowered. 
Poa annua, Linn. Spec. p. 99 ; Kunth , Enum. 1 ,p. 349. San Francisco, April. A common 
grass in the settled parts of California, and doubtless introduced from Europe. 
Poa trivialis, Linn. Spec. 1. c.; Kunth, l. c. Mark West’s creek, California; April 30. This 
also must be an introduced grass. 
Festuca microstachys, Nutt. PI. Gamb. in Jour. Acad. Phil. (n. ser.) 1, p. 187. Hill-sides, 
Napa Valley, April 26, (an unusully large form) ; near San Francisco, April 8, (a dwarf state.) 
This is a polymorphous species. The sheaths of the leaves are often retrorsely pubescent, but 
not unfrequently smooth. The panicle, in the humbler form, is strict and spikelike; but in 
more luxuriant specimens several of the lower branches are somewhat elongated, and at length 
spreading or diverging and secund. In a variety (as we are inclined to regard it) from Mark 
West’s creek the panicle is very open, and the spikelets are all distant and diverging. The 
palem in some of the specimens from Napa Valley are puncticulate-scabrous, and not hairy. No. 
2030 of Hartweg’s collection is a variety of this species. 
Festuca tenella, Willd. Sp. 1, p. 419? var. aristulata. Hill-sides, Napa Valley. Very 
likely this may prove to be a distinct species from F. tenella of the Eastern States. 
Festuca pratensis, Huds.; Kunth, Enum. 1 ,p. 404. Corte Madera and Tomales Bay, April. 
Introduced ? 
