36 CRUCIFER2. [Sesymbrium. 
3. SISYMBRIUM, Linn. 
Annual or more rarely perennial erect herbs, either glabrous or 
more or less tomentose or hairy. Flowers small, white or yellow, 
usually in rather lax racemes. Sepals short or long, equal or the 
lateral saccate. Petals with long claws. Style short; stigma 
2-lobed. Pod iong, slender, terete or slightly compressed; valves 
convex; septum membranous. Seeds usually numerous, not mar- 
gined, in a single row in each cell; cotyledons incumbent. 
A genus of about 80 species, widely spread in Europe and from thence to 
eastern Asia, and with a few representatives in most temperate countries. The 
single New Zealand species is endemic. 
1. S. novee-zealandiz, Hook. f. Handb. N.Z. Fi. 11.—An erect 
slender sparingly branched herb 6-18 in. high, usually hoary 
with minute stellate pubescence, rarely almost glabrous. Leaves 
chiefly radical, very variable in size and shape, 4-2 in. long; petiole 
long or short; blade 1-1 in., obovate to narrow-oblong, quite entire 
or sinuate-toothed or pinnatifid; lobes usually blunt. Cauline leaves 
few, smaller. Flowers small, white. Fruiting racemes rather lax ; 
pedicels slender, $-#in. long. Pods 1-2in. long, .— 4, in. broad, 
narrow-linear, obtuse, spreading, glabrous; valves slightly convex. 
inidrib distinct; style very short. Seeds numerous, small; coty- 
ledons incumbent.— Kirk, Students’ F'l. 30. 
SoutH Isuanp: Nelson—Wairau Gorge, Travers, Rough. Canterbury— 
Broken River, Coleridge Pass, Porter’s Pass, Kirk! Hnys! Mackenzie Plains 
and Lake Tekapo, T. #. C. Otago—Not uncommon in the eastern and central 
portions of the district, Petrie ! Altitudinal range from sea-level to 3000 ft. 
December—January. 
4. PACHYCLADON, Hook. f. 
A short stout depressed alpine herb, clothed with stellate 
pubescence. MRootstock long, thick and fleshy. Leaves small, 
rosulate. Flowers small, white. Sepals equal. Petals with long 
claws. Stamens free, toothless. Pod laterally compressed, linear- 
oblong; valves boat-shaped, keeled, not winged; nerves obscure ; 
septum imperfect. Seeds 3-5 in each cell, obovoid; funicles short. 
Cotyledons incumbent. 
The genus consists of a single species, confined to the southern portion of 
the colony. SirJ. D. Hooker remarks that in technical characters it is inter- 
mediate between the tribes Sisymbriee and Lepidinee, but is probably referable 
to the latter. 
1. P. novee-zealandiz, Hook. f. Handb. N.Z. Fl. 724.—Root 
very long, fusiform, stout and fleshy, as thick as the finger, in old 
specimens branched above, crowned with a dense rosette of imbri- 
cating radical leaves. Leaves +-lin. long; blade oblong, pinna- 
tifidly lobed, gradually narrowed into a short flat petiole, clothea 
with stellate pubescence. Cauline leaves few, smaller, digitately 
lobed. Peduncles numerous, springing from below the leaves and 
