* Leaves undivided.

It. Luteola: annual or biennial; stems 1-2 feet high, erect, glabrous; leaves linear or lanceolate, 2-3 inches long, slightly waved on the edges; flowers yellowish green, in long, stiff spikes; sepals four; petals 4-5, very unequal, the one or two lower ones entire, the upper ones divided into 2-5 lobes; capsules nearly globular. - Weld or Dyer's Rocket. - Waste places, in chalky districts. - Fl. July, August.

** Leaves deeply cut.

R. lutea: stems one foot high, branched; leaves variable, but always deeply divided, mostly once or twice trifid, but occasionally pinnatifid, with few oblong or linear segments, much waved on the margins; flowers in long racemes; sepals usually six, sometimes only five; petals as many, of a greenish-yellow, the lowest entire or two-cleft, the others irregularly divided into two, three, or four lobes; capsule oblong. - Waste places, in limestone districts. Fl. June to August.

(18) Matthiola. Stock. M. incana: stem 1-2 feet high, erect, usually perennial, and almost woody at the base, but not of long duration, with hard, slightly-spreading branches; leaves oblong-linear, obtuse, entire, soft and hoary on both sides; flowers purple or reddish, rather large; pod 4-5 inches long, crowned by the short stigmas. - Gilliflower. - Cliffs in the Isle of Wight. Fl. May, June.

M. simiata: stem one foot high, with spreading branches, perennial, but of short duration; leaves deeply sinuate, covered over with short hoary down; flowers purple; pods compressed, usually more or less covered with glandular protuberances. - Sandy sea-shores of the south and west coasts. Fl. August.