FUMAKIACE^E. (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. PAP AVER, 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 l-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.alpinumof 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-lobcd, with prickly teeth. Flower-buds erect. 



1. A. platyceras, Link & Otto. Erect, 1 to 2.V 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. hispida, Gray. Colorado to Mexico and westward. 



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

 south. 



ORDER 5. FUMABIACEJE. (FUMITORY FAMILY.) 



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

 irregular hypogynous flowers with parts 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 onrs) at the base. 



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



