FUMARIACE^. (FUMITORY FAMILY.) 13 



2. N. polysepalum, Engelm. Larger: leaves 6 to 12 inches long, 



rounded above, deeply cordate at base : sepals 8 to 12 : petals dilated and unlike 

 the stamens, often tinged with red : fruit globular. Mountain lakes in Colo- 

 rado, westward and northward. 



ORDER 4. PAPAVERACE^E. (POPPY FAMILY.) 



Herbs, usually with milky or orange-yellow juice ; sepals 2 or 3, 

 caducous; petals twice as many, in two sets; stamens indefinite; ovary 

 1 -celled, with parietal placentae; seeds numerous. Leaves alternate, 

 without stipules. Petals imbricated and commonly crumpled in the 

 bud. 



1. Papaver. Ovary incompletely several-celled by the projecting placentae. Stigmas 



united into a radiate crown. Pod opening by chinks or pores under the edge of 

 the stigma. 



2. Argemone. Ovary strictly 1-celled. Pod opening by valves, and with the leaves 



prickly. 



1. PAPAVER, L. POPPY. 



Sepals 2. Stigma 4 to 20-rayed. Pod short and turgid. Herbs with a 

 white juice, and nodding flower-buds. 



1. P. nudicaule, L. Scape 1-flowered, 2 to 3 inches high, naked, hispid 

 as well as the calyx with brownish hairs : leaves lance-ovate in outline, deeply 

 pinnatifid : petals lemon-yellow : pod obovate, hispid. P. alpinum of the Fl. 

 Colorado. Alpine. Colorado and in Arctic America. 



2. ARGEMONE, L. PRICKLY POPPY. 



Sepals 2 or 3, often prickly. Stigma 3 to 6-rayed. Pod oblong; seeds 

 crested. Well marked by the prickly bristles and yellow juice. Leaves 

 sessile, sinuate-lobed, with prickly teeth. Flower-buds erect. 



1. A. platyceras, Link & Otto. Erect, 1 to 2J feet high, hispid 

 throughout or armed with rigid bristles or prickles : lower leaves attenuate 

 to a winged petiole ; the upper sessile or auriculate-clasping : flowers white : 

 pod oblong. A^hfspida, Gray. Colorado to Mexico and westward. 



It is doubtful whether A. Mexicana occurs in Colorado, but it ranges farther 

 south. 



ORDER 5. FlIMARIACE^E. (FUMITORY FAMILY.) 



Tender herbs, with watery juice, dissected compound leaves, perfect 

 irregular hypogynous flowers with rjarts in twos, except the diadelphous 

 stamens which are 6, ovary 1-celled, seeds, etc. as in Papaveracece, to 

 which order Bentham &. Hooker have united it. 



1. Dicentra. Corolla heart-shaped (in ours) at the base. 



2. Corydalis. Corolla 1-spurred at the base. 





