6 FLORA OF TASMANIA. | Orchidee. 
Haz. Sandy soil at Welcome River, Circular Head, etc., not uncommon, Lawrence, Archer, Gunn.— 
(Fl. Nor.) 
DistriB. New South Wales, Victoria, and South Australia. 
I am indebted to Mr. Archer for discriminating my specimens of this species, which were much intermixed 
with 7. nuda. It is distinguished by being generally a large, very stout plant, sometimes 3 feet high; it has a 
large radical leaf, large loose sheathing 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 
lobes: 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. Thelymitra ixioides (Smith, Exot. Bot. i. t. 29); caule strictiusculo 1-18-floro, floribus pal- 
lide ceruleis maculatis, columns apice truncate lobis lateralibus longe porrectis plumosis intermedio trifido 
dentato v. fimbriato longioribus, anthera inclusa acuminata.— Br. Prodr. 314; Lindl. Gen. et Sp. Orchid. 
522. T. juncifolia, Zindl. le. T. iridoides, Sieb. P. Nov. Holl. 168. T. lilacina, Müller. (Gunn, 
935, 936, 939.) (Tas. CIII. B.) 
Has. Abundant throughout the Colony.—(Fl. Nov., Dec.) (v. v.) 
DisrarB. New South Wales, Victoria, South Australia, and Swan River. 
Similar in general appearance and habit to T. nuda, and presenting as great varieties in size, stature, slender- 
ness of stem, and size and number of flowers, but the latter are paler and spotted with black; it is at once distin- 
guished by the truncate top of the column, 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 irregular form and size, but 
the two lateral are generally the longest, and all are more or less toothed, cut, or fimbriate. The lateral lobes of 
the column, which have feathery tips, almost invariably point more upwards than in 7. nuda, and usually consi- 
derably overtop the truncate middle lobe. Anther with a long point.—PrATE CIII. B. Fig. 1, lateral, and 2, front 
view of column :—¿oth magnified. 
Gen. II. DIURIS, Smith. 
Perianthium ringens. Sepala inferiora linearia, labello supposita, supremum latius subfornicatum. 
Petala patentia, unguiculata. Zabellum sessile, trilobum, ecalcaratum. Columna brevis, utrinque lobo 
petaloideo (staminodio) laterali stipata. Anthera mutica, stigmati parallela, persistens, bilocularis. Pol- 
linia 2, biloba.—Herbee glabre ; caulibus basi tuberibus duobus oblongis sessilibus terminatis ; foliis radi- 
calibus linearibus, paucis v. pluribus ; scapo vaginato, apice 1—4-floro ; 
pedunculatis, majusculis, plerumque luteis Purpureo-maculatis, 
mosis. 
bracteis magnis ; floribus longe 
rarius albis Purpureisve, paucis, laze race- 
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 
dages, which are deformed stamens, and answer to the feathery lateral lobes 
from Ae, two, and ovpos, a tail ; in allusion to the long, narrow lateral sepals.) 
1. Diuris maculata (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 subzequalibus 
