in =ONAGRACEAE=, p. 78.

137a. Leaves narrowly oblong 1a, in =HALORAGIDACEAE=, p. 79.

137b. Leaves roundish and somewhat heart-shape
12a, in =SAXIFRAGACEAE=, p. 50.

138a. Flowers in racemes or simple spikes --139.

138b. Flowers in panicles or other branched clusters --141.

139a. Leaves toothed or lobed 52b, in =CRUCIFERAE=, p. 46.

139b. Leaves entire --140.

140a. Flowers sessile; leaves heart-shape =PIPERACEAE=, p. 19.

140b. Flowers pedicelled; leaves obovate
8b, in =PRIMULACEAE=, p. 87.

141a. Individual flowers distinct from each other, on pedicels --142.

141b. Individual flowers crowded in close clusters, or separate and
sessile --143.

142a. Leaves finely serrate 3b, in =CRASSULACEAE=, p. 49.

142b. Leaves entire 1b, in =CISTACEAE=, p. 74.

143a. Flower-clusters mingled with sharp-pointed bracts
=AMARANTHACEAE=, p. 30.

143b. Flower-clusters without bracts, or (rarely) with bracts which are
not sharp-pointed =CHENOPODIACEAE=, p. 28.

--144--

144a. Juice not milky --145.

144b. Juice milky; apparent flowers consisting of a few white or
colored petal-like bracts, inclosing a few inconspicuous
flowers without petals. In some of them a 3-lobed ovary with
3 styles may be plainly seen =EUPHORBIACEAE=, p. 66.

145a. Plants of the composite type, with several or many small flowerets
closely aggregated into a dense head subtended by a calyx-like
involucre of small bracts --146.

145b. Flowers solitary or in clusters, but not in involucred heads
--147.

146a. Leaves compound with 3 leaflets; stipules present
=LEGUMINOSAE=, p. 58.

146b. Stipules none =COMPOSITAE=, p. 113.

147a. Leaves compound or deeply lobed --148.

147b. Leaves simple and not deeply lobed --154.

148a. Flowers irregular =LEGUMINOSAE=, p. 58.

148b. Flowers regular --149.

149a. Petals 3 =LIMNANTHACEAE=, p. 68.

149b. Petals 4 --150.

149c. Petals 5 or more --151.

150a. Stamens 4