WILD FLOWKRS OF XEW YORK 22^ 



Butterfly Weed; Pleurisy Root 



Asclepias tiihcrosa Linnat'us 



Plate 171 



Stems very hairy, rather stout, usually branched above, erect or 

 ascending, i to 2 feet high from a stout, perennial root, with slightly milky 

 sap. Leaves alternate, oblong to lanceolate, pointed or blunt at the apex, 

 narrowed, rounded or heart-shaped at the base, sessile or very short petioled, 

 2 to 6 inches long, one-fourth to i inch wide. Flowers bright orange or 

 yellow, numerous in terminal, cymose umbels; lobes or segments of the 

 corolla about one-fourth of an inch long, reflexed in flower; the segments 

 of the five-parted crown (corona) about one-third of an inch long; hoods 

 erect, oblong, bright orange or yellow and two to three times as long as 

 the stamens and longer than the filiform horns. Fruit a finely ])ubescent 

 pod (follicle), 4 to 5 inches long. 



In dry fields and roadsides, Maine to Ontario and Minnesota, south 

 to Florida and northern Mexico. Flowering from July to September. 



Swamp Milkweed 



Asrlcpias iiicdniata Linnaeus 



Plate t::! 



Stems slender, often 2 to 5 feet tall and leafy throughout, more or less 

 branched, smooth or minutely pubescent in two lines along the upper part 

 of the stem. Leaves opposite, oblong-lanceolate, pointed at the apex, 

 narrowed or sometimes slightly heart-shaped at the base. 3 to 7 inches 

 long, one-half to ik inches wide; petioles very short. Flowers numerous in 

 many-flowered terminal, stalked umbels; pedicels of tlie flowers pubescent, 

 one-half to i inch long; corolla red or rose-purple, its lol)es oblong; column 

 more than one-half as long as the obtuse pink or purplish hoods; horns 

 slender, incurved, longer than the hoods. Fruit an erect pod (follicle), 

 2 to 4 inches long. 



