22 CRUCIFERE. (MUSTARD FAMILY.) 
Orprer 5. FUMARIACEZ:. 
Tender herbs with dissected compound leaves, and irregular hypogynous flowers, the 
parts in twos, except the 6 diadelphous stamens, 
1. DICENTRA, Borkh. 
Sepals 2, small and scale-like, sometimes caducous. Corolla of two pairs of petals, 
flattened and cordate; the outer pair the larger and sacked at the base, the tips spreading; 
the inner, spoon-shaped, lightly united at the apex, inclosing the anthers and stigma. 
Stamens in two sets, 3 before each of the outer petals, filaments slightly cohering. 
Style slender; stigma 2-lobed, each lobe sometimes 2-crested. 
1. D. formosa, DC. Leaves radical, and the compound racemes of rose-colored 
flowers borne on naked scapes. 
2. D. chrysantha, Hook. & Arn. The flowers in long terminal paniculate racemes 
on leafy stems; corolla narrow, scarcely cordate, golden yellow. 
Ozpzr 6. CRUCIFERA:. 
Herbs with pungent watery juice. Sepals 4. Petals 4, with blade narrowed into a 
claw, the lamina spreading to form a cross, rarely wanting. Stamens 6, two of them 
inserted lower down on the receptacle and shorter than the other four. Ovary 2-celled 
by a thin partition, rarely l-celled. Leaves alternate, and flowers usually in racemes 
without bracts. 
Since a careful examination of the fruit is usually necessary for the determination of 
species in this difficult order, only such plants as have large flowers or remarkable fruit 
.. are here described. 
§ 1. Pod dehiscent, 2-valved. 
* Pod elongated, compressed parallel with the partition; seeds flat. 
Pctioled leaves, lobed or divided; root tuberous................-.....Cardamine, 1 
Stem leaves sessile, entire; root perpendicular. 
Flowers purple...........-.ee cece e ee eee ee eee eens eenees bins Sie'eig's's else's Arabis. 2 
Flowers Orange ......eeeeee cree re eeee nes Soe\sa waiters wassieie's Sakjd e atate Cheiranthus. 3 
Flowers yellowish......... Saree abies bdteasd a lecarerteare sia! sig ble eieibie wizistnxere .. Brysimum. 4 
** Pod terete; seeds globose. 
Flowers Yellow.........-0+0--0++ Sree ee avis se’ seeeies Brassica. 5 
*** Pod flattened contrary to the partition. 
Pod linear; flowers axillary, yellow..............cceeceeeee cee Tropidocarpum. 6 
Pod obcordate; flowers minute............. SiG DENS SPELERE 5 hake ame nnTe Capsella. 7 
Pod obovate, 2-winged at the top.... 2.0... . cece cece c een cece nee e ec eee Lepidium. @? 
