H a b . Sandy soil at Welcome River, Circular Head, etc., not uncommon, Lawrence, Archer, Gunn.—
(FI. Nov.)
D is t r ib . New South Wales, Victoria, and South Australia.
I am indebted to Mi'. Ai'chcr for discriminating my specimens of this species, which were much intermixed
with T. nuAa. It is distinguished by being generally a large, very stout plant, sometimes 8 feet high; it has a
large radical leaf, large loose slieathing bracts on the scape, large pale unspotted flowers: the middle lobe of the
column is arched, notched or bifid, with deeply crenate or fimbriate margins; it usually overtops the lateral feathery
lohes : the anther is blunt, with a short, stout apiculus.—Brown’s specimens in the British Museum are very small
and slender, though not more so than many of ours, and we rely on the description of the lobes- of the column for
the identification of our plant with his.
7. T he lym itra ix io id e s (Smith, Exot. Bot. i. t. 29) j caule strictiusculo 1-18-floro, floribus pallide
cffiruleis macdatis, column® apice truncal® lobis lateralibus longe porrectis plumosis intermedio trifido
dentato v. fimbriato longioribus, anthera inclusa acuminata.—.Rr. Prodr. 3 1 4 ; Lindl. Gen. et Sp. Orchid.
522. T. juucifolia, Lindl. I.e. T. iridoides, Sieb. PL Nov. Roll. 168. T. lilacina, Müller. (Gunn,
935, 936, 939.) (T a b . C III. B.)
H a b . Abundant throughout the Colony.— (FI. Nov., Dec.) (y. v.)
D is t r ib . New South Wales, Victoria, South Australia, and Swan River.
Similar iu general appearance and habit to T. nuda, a\ii\ presenting as great varieties in size, stature, slenderness
of stem, and size and number of flowers, but tlie latter are paler and spotted with black; it is at once distinguished
by the truncate top of the cokmm, which does not terminate in a rounded hood which overtops the lateral
lobes. The middle lobe of the column is trifid; the three inner segments are of very iiTegular foi-m and size, but
the two lateral are generally the longest, and all are more or less toothed, cut, or fimbriate. Tlie lateral lobes of
the column, wliich have featheiy tips, almost invariably point more upwards than in T. nuda, and usually considerably
overtop the truncate middle lobe. Anther with a long point.—P la t e CIII. B. Fig, 1, lateral, and 2, front
view of column:—both magnified.
Gen. I I . DIURIS, Smith.
Pei-ianthium riugens. Sépala inferiora linearía, labello supposita, supremum latius subfornicatum.
Pétala patentia, ungniculata. Jjdbellum sessile, trilobum, ecalcaratum. Columna brevis, utrinque lobo
petaloideo (staraiiiodio) laterali stipata. Anthera mutica, stigmati parallela, persistens, bilocularis. Pol-
linia 2, biloba.—Herb® glabra j caulibus basi iuberibus duobus oblongis sessilibus terminatis; foliis radi-
calibus linearibus, paucis v .p lu rib u s; scapo vaginato, apice \-4i-floro; bracteis magnis j floribus longe
pedunculatis, majusculis, plerumque luteis purpureo-maeulatis, rarius albis purpureisve, paucis, laxe race-
mosis.
The species of this genus are generally handsome, and always variable, especially in the breadth and colour of
the segments of the perianth, and their markings. About twenty species are known, all Australian, and chiefly
natives of South-eastern Australia; only one is tropical.—Flowers yellow in all the Tasmanian species; two lower
sepals linear (often green), placed below the three-lobed, spurless, sessile lip; upper sepal broader, arched. Petals
spreading, horizontally clawed. Column short, furnished at the base on each side witli two erect, petaloid appendages,
which are deformed stamens, and answer to the feathery lateral lobes of the column of Thelymitra. (Name
from 8«, two, and oupos, a tail; in allusion to the long, narrow lateral sepals.)
1. D iu r is macúlala (Smith, Exot. Bot. t. 30); foliis 1 -2 anguste linearibus lanceolatis filiformi-
busve scapo 2-5-floro brevioribus, floribus aureis purpureo-variegatis, sepalis inferioribus labello longiori-
bus, petalis longe unguiculatis obovato-orbiculatis rhombeisve, labelli basi bicarinati laciniis sub®qualibus
obcuneatis, staminodiis falcatis acutis antice serratis.—Br. Prodr. 315. Bot. Mag. 3156. D. curvifolia,
Lindl. Gen. et Sp. Orchid. 507. (Gunn, 343.) (T a b . CIV. B.)
I I a b . Very abundant in pastures and loose forests throughout the Colony.— (FI. Oct.) (v. v.)
D is t r ib . New South Wales and Victoria.
A most common and extremely variable plant, -which I vainly attempted, when in Tasmania, to find constant
characters for; it varies in height from 4-13 iticlies, in the leaves being veiy narrow, linear-subulate or linear-
lanccolate, in the scape being two- to ten-flowered, in the flowers being from i to 1 inch across the petals (rarely
more), and extremely in the narrowness of the petals aud tliefr spots, in the comparative size and shape of the segments
of the lip, in the length of the two lower linear sepals, which are generally mucli longer than the lip, and
cross over one another, but are at other times free and straight, and a little in the form and toothing of the lateral
lobes of the column. As a species it may be known by the stipitate broad petals, and equally three-lobed li¡),
which has two prominent lidges at the base.—P l a t e CIV. B. Fig. 1 and 2, front and side view of lip ; 3 and 4 ,
front and back view of coliunn:—all magnified.
2. D iu r is p a lu str is (Lindl. Gen. et Sp. Orchid. 50 7 ); parvula, foliis 6 - 8 anguste linearibus scapo
2-3-floro fere ®quaiitibus, floribus aurantiacis purpureo-variegatis, sepalis inferioribus petalis lanceolatis
duplo longioribus, labelli basi obscure bicarinati lobis ®qualibus intermedio subplicato, staminodiis falcatis
acutis antice serratis. [Gunn, 933.)
H a b . Marshy ground near Hobarton, Circular Head, etc., Backhouse, Gunn. Port Dalrymple, Pal-
tes-son.— (FI. Dec.)
D i s t r ib . Victoria and South Australia.
A small species, rarely more than 4 inches high, with numerous nan'ow-linear, almost filiform radical leaves,
shorter than the two- or three-flowered scape.— Peduncles |~ 1 inch long. Flowers small, ^ inch across; the petals
very dark-coloured, of a deep orange, almost obscured by dark purple-red blotches. Lower sepals longer than in
D. macúlala, and petals narrower.
3. D iu r is sulphurea (Br. Prodr. 31 6 ); foliis 2 -3 anguste linearibus scapo 2-4-floro dimidio brevioribus,
floribus aureis purpureo-maeulatis, sepalis inferioribus petalis spathulato-lanceolatis longioribus,
labelli basi ecarinati lobo intermedio lateralibus duplo triplo majore, staminodiis falcatis latere sublobatis
acuminatis.— Lindl. Gen. et Sp. Orchid. 509. (Gunn, 342, 932.) (T a b . CIV. A.)
H a b . Common in many parts of the Colony.— (FI. Nov.) (v. v.)
D is t r ib . New South Wales, Victoria, aud South Australia.
A larger and handsomer plant than D. macidata, further easfly recognized by the paler, less-blotched flowers,
by the labellum not having two elevated ridges at its base, and by the middle lobe being larger, and generally more
than twice as large as the lateral. The majority of my specimens are a foot to 18 inches high, and the flowers are
1- l j inch across the petals; the upper sepal is tiTilliform, with a very short claw, and two spots on each side of the
middle; the two lower are linear, and vaiy from as long as to twice as long as the lip : they rarely cross one another;
the petals are golden-yellow, with a deep purple-brown claw, and the labellum golden-yellow, bluiit, with a prominent
mesial line corresponding with a canal on the lower surface, have two large blotches on each side of the middle
lobe, one small transverse one across the middle nearer its base, and mottled or clouded lateral lobes; these markings
are however variable in size aud shape.—P la t e CIV. A. Fig. 1, dorsal sepal; 2 , petal; 3 , lateral, and 4,
front view of labellum; 5. front, aud 6, back view of column :—all magnified.
4. D iu ris corymbosa (Lindl. Swan River Bot. n. 22 8 ); foliis 2 -3 linearibus ensiformibusque scapu
2-4-floro brevioribus, floribus fiavo-purpureis, sepalis lateralibus petalis spathulatis sub®quantibus, labelli
lobis submqualibus intermedio obcuneato basi ecarinato, staminodiis falcatis crenatis.—Lindl. Gen. et Sp.
Orchid. 511. An P. aurea, Br. Prodr. 316? (Gunn, 342, anno 1835, 931.) (Tab. CV. B.)