Bromus Dianprus. Dianprous Brome-Grass. 
BROMUS Linn. Gen, PI. Trtanpria Dieynia, 
Cal, 2-valvis. Spicula oblonga, teres, difticha ; arifta infra apicem, 
Rai Syn. Gen, 27. HERBA GRAMINIFOLI FLORE IMPERFECTO CULMIFER&, 
BROMUS diandrus panicula ereCo-patente, fpiculis multifloris, flofculis diandris. 
BROMUS muralis panicula patulo-ereéta fimplici, fpiculis linearibus, floribus acuminatis fcabris, ariftis 
| longis. Hud/. Fl, Angl. ed. 2. p. 50. 
BROMUS madritenfis panicula rariore patulo-ereéta; fpiculis linearibus; intermediis geminis, pedicellis 
| füuperne incraffatis. Linn. Sy/t. Vegetab. ed. 14. Murr. p. 120. ? 
GRAMEN bromoides, pumilum, locuflis ere&is, majoribus, ariftatis. Scheuchz. Agr. ed. Hall. p. 260. 
BROMOS fterilis ere&a panicula major. Barr. ic. 76. 7. 1. | 
CC PDA OA AM SS AAA nA SE ARCS SERED 
We many years fince obferved the grafs here reprefented, growing on the wall of a garden near Batterfea 
Church, fituated at a {mall diftance from the high-road which leads from the Lun to Batterfea, out of which 
you turn in proceeding to the church ;—a few yards down this turning, on the garden-wall to the right, it will 
readily be found: for on the fame fpot, we obferved it again this prefent fummer, in company with Mr. Octe, 
Surgeon, Great Ruffel-Street, Bloom{bury; on the top of the wall it was in a ftunted fate, at the foot of it 
more luxuriant. 
On the firft difcovery of this plant, I was induced, from a curfory view, to regard it as a variety of Bromus 
fferilis, with peduncles fhorter than ufual; but having introduced it to my garden, and found that feveral years 
culture made no alteration in its principal charaéter, I had little doubt of its being a diftin@ fpecies, and the 
little I had was completely removed, when I came to diffe& the parts of fruétification; for, to my great 
aftonifhment, I found that there were only two ftamina to each flower, and that generally. 
Growing in the fame fituation as the /ferz/r, it is a fmaller plant; the fpicule in the /ferz» ftanding on long 
peduncles (whereby they are rendered weaker) conftantly droop; in the Z/azdrus the peduncles being fhort, 
fupport the {picule in an upright pofition; this gives a different air to the plant, which otherwile from the 
great fimilarity of its flalks, foliage, fize and form of its fpicule, would be very liable to be confounded with 
the flerilis. | 
In dry feafons, when the Bromus diandrus grows on walls, it is much fhorter than the plant we have figured; 
in fuch fituations, more particularly as the plant advances to maturity, the panicle clofes together, and the 
fpicula become of a brownifh purple hue ; in this ftate it differs fill more obvioufly from the /feri/is, and may 
be diftinguifhed even at a diftance: we are not, however, to regard this plant as confined to walls; like the 
Jflerilis, 3t is found on them by accident: we obferved it in the year 1793, on the banks of the Severn, at the 
foot of St. Vincent's Rock, where my very good friend, Dr. Fon», then refident at Briftol, alfo obferved it to 
grow in great plenty. 
If our plant be the Bromus madritenfis of Linn &us, which we are induced to believe, from its according fo 
well with the figure of BAnnELIER, to which he refers, it will be found to be a native of Spain, and Italy, and 
perhaps of other different parts of Europe: there can be little doubt of its being the murals of Mr. Hupson, 
though he has omitted to notice the peculiar circumftance of its having only two ftamina, a phenomenon fo 
unufual in plants of this tribe, that we have thought it ought to receive its trivial name from it, more efpecially 
as the plant is found to be confined to no particular country or fituation. 
It flowers in May and June, and ripens its feeds in July ; is an annual of ready growth, and much difpofed to 
become a weed. | 
Unlefs the flowers are examined when very young, the frefh ftamina are not to be feen, but the flowers out 
of bloom generally retain them in a dried fate. 
Of foreign graffes there are feveral defcribed with two ftamina, in. particular the Saccharum Thunbergi and 
Koenigii, and the Agroftis diandra, Linn, Syft. Nat. ed. 19. Gmelin. of our Englifh graffes, none fuch as yet have 
been obferved, befides the prefent one, and the Anthoxanthum odoratum. 
Partes Fruélificationis. The Parts of the Fructification. 
Fig.1. Glume Calycine. ig. 1. The Glumes of the Calyx. 
Fig. 2. Glume Corollacez. Fig. 2. The Glumes of the Corolla. 
Fig. 3, 4, 5. 6. Gluma Corollacea interior, Sta- 
Fig. 3, 4, 5, 6. The inner Glume of the Corolla, 
mina, Piftillum, Neétaria, lente aut. | | 
Stamina, Piftillum, and Ne¢taries, magnified, 
Fig. 7. Pifüllum magis auét. 
MO OLS OOOO Oro Sno, 
Fig. 7. The Piftillum more enlarged. 
