ADDENDA AND CORRIGENDA. 847 



throughout their whole length or nearly so very numerous minute 

 flowers. Flowers on slender pedicels of about 2 lines, nearly 

 globular from the incurving of the sepals and petals, of a greenish 

 white sometimes tinged with pink, and less than 2 lines in diameter. 

 Bracts minute. Sepals somewhat larger than the petals. Labellum 

 small, the lateral lobes purplish, blunt, ovate-oblong, middle lobe 

 stalked, for the most part composed of a globular mass of glan- 

 dular white hairs. Disc calli orange yellow. Column short; 

 anther-lid stained with purple. Capsule narrow, straight, 2-2^ in. 

 long. 



Hab. : Eidsvold, Dr. T. L. Bancroft. 



P. 537. — After Diuris punctata, Sin., add: — 



var. minor, Bcnth. ? (Fl. Austr. vi. 327).' — Specimens of what 

 I think is this variety I have recently received from Miss Morris, 

 Ormiston, but the middle lobe of the labellum in our plant is not 

 especially rhomboidal. (Fig. 973 c & d.) 



forma Blakneyse, Bail., n. form. — This form principally 

 differs from the normal plant in the seeming absence of dots in 

 the flower and in the almost rotundate middle lobe of the 

 labellum. 



Hab.: Ravenshoe, Miss F. Blakney. (Fig. 973E ) I collected a 

 specimen in 1874 at Maroochie in which the labellum closely resembles 

 that of this new form. This latter specimen, however, is in very bad 

 condition. (Fig. 973B.) 



P. 537. — After Diuris add : — 



Orthoceras, R. Br. — Dorsal sepal erect, incurved, hood- 

 shaped ; lateral sepals narrow-linear, long and erect ; petals short, 

 erect, narrow. Labellum 3-lobed, the middle lobe larger and con- 

 tracted at the base, a thick callus on the disk between the lateral 

 lobes. Column very short, with lateral erect lobes not connected 

 behind the anther. Anther erect or slightly incurved, tapering to 

 the end, the 2-valved cells occupying the whole inner face. Pollen- 

 masses granular or mealy. Rostellum very short. Terrestrial 

 glabrous herb, with an ovoid tuber, few narrow leaves, and several 

 sessile flowers. The genus is limited to the single Australian 

 species, found also in New Zealand. 



1. O. strictum, R. Br., Prod. 317; Benth., Fl. Austr. vi. 332. — 

 Stem rigid, erect, 1 to i l / 2 ft. high. Leaves several near the base, 

 linear, 3 to 6 in. long, or one or two outer ones short and lanceo- 

 late, and 2 or 3 long sheaths with short erect laminae above the 

 leaves. Flowers distant, erect, in an interrupted spike, the sub- 

 tending bracts sheathing, acute, sometimes scarcely exceeding the 

 ovary, sometimes much longer than the dorsal sepal. Dorsal 

 sepal broad and very concave, much incurved, acute or obtuse, 

 about l / 2 in. long, greenish or white outside, brown purple or 

 yellowish inside ; lateral sepals antenna-like, slightly clavate, 



