3. C. bilobata, T. Kirk, Students' Fl. 27.—Perfectly smooth and glabrous, 4–12 in. high. Rootstock rather stout. Leaves all radical, on slender petioles 1–4 in. long; blade ½–1½ in. long, oblong or obovate, in small specimens sometimes entire, but usually pinnatifid with a very large terminal lobe and 1 or 2 pairs (rarely more) of small spreading lobes at its base. Flowering-stems 1–3, few-flowered, naked; pedicels slender, ½–1 in. long or more. Flowers large, white, sometimes nearly in. diam. Pods ¾–1 in. long, narrow-linear, spreading; style long and slender.
South Island: Canterbury—Broken River, T. F. C. Otago—Kurow Mountains, Mount Ida Range, Hector Mountains, Petrie! Altitudinal range 1000–3000 ft.
The fully developed state of this plant is well marked by the peculiarly lobed leaves, large flowers, and spreading pods with long slender styles. But small varieties, with the leaves entire or nearly so, show a tendency to approach C. depressa.
4. C. stylosa, D.C. Syst. Veg. ii. 248.—A tall rather coarse perfectly glabrous leafy branching herb 2–3 ft. high; erect or decumbent. Leaves 3–5 in. long, oblong-lanceolate or oblong-spathulate, entire or more usually minutely and remotely sinuate-toothed, sometimes lobed or pinnatifid at the base; uppermost sessile, auricled at the base; lower on long petioles. Racemes very long, 1–2 ft. Pedicels stout, short, spreading. Flowers small, white. Pods horizontally spreading, 1–1½ in. long, 112 broad; style stout. Seeds red-brown, with a reticulate testa.—Hook. f. Handb. N.Z. Fl. 12; Kirk, Students Fl. 27. C. divaricata, Hook. f. Fl. Nov. Zel. i. 13. Arabis gigantea, Hook. Ic. Plant. t. 259.
Kermadec Islands: Macaulay Island, not uncommon, T. F. C. North Island: In several localities from Mongonui southwards, but often rare and local. South Island: Marlborough—Queen Charlotte Sound, Banks and Solander! Picton, J. Rutland; Mount Stokes, J. Macmahon.
Readily known by its large size and branched leafy habit long racemes, and horizontally spreading pods and pitted seeds. It is a common Australian and Tasmanian plant.
5. C. fastigiata, Hook. f. Handb. N.Z. Fl. 13.—Rootstock long, stout, tapering, often as thick as the finger, bearing at the top a rosette of densely crowded radical leaves Leaves 1½–3 in. long, linear- or lanceolate-spathulate, acute, sharply and deeply inciso-serrate, gradually narrowed into a broad flat petiole, thick and coriaceous, glabrous or with a few weak hairs on the margins. Cauline leaves similar, but smaller and less toothed. Flowering-stems usually several springing from the top of the rootstock among the radical leaves, simple or branched, 6–18 in. high. Flowers numerous, white, corymbose, about ⅓ in. diam. Petals ⅓ in. long, spathulate, on long claws. Pods erect or nearly so, straight or curved, acute at both ends, narrow-linear, 1–2 in. long, 115–112 broad. Seeds
