440 DROSERACEAE (SUNDEW FAMILY) 



body, the 5 delicate rays terminating under the angles in as many little hooked 

 stigmas. Capsule with a granular surface, 5-celled, with many-seeded placentae 

 in the axis, loculicidally 6-valved. Seeds anatropous, with a small embryo at 

 the base of fleshy albumen. Perennials, yellowish green and purplish; the 

 hollow leaves all radical, with a wing on one side, and a rounded arching hood 

 at the apex. Scape naked, 1-flowered ; flower nodding. (Named for Dr. 

 Michel Sairasin, physician at the Court of Quebec early in the 18th century, 

 who sent our northern species to Europe. ) 



1. S. purpurea L. (SIDE-SADDLE FLOWER, PITCHER-PLANT, HUNTSMAN'S 

 CUP.) Leaves pitcher-shaped, ascending, curved, broadly winged ; the hood 

 erect, open, round heart-shaped, covered within by reflexed bristles; Jluwer 

 globose, scapose, deep purple ; the fiddle-shaped petals arched over the greenish 

 yellow style. Peat-bogs, Lab. to Mackenzie, s. to Fla., Ky., the Great Lake 

 region, and s. e. la. June. The curious leaves are usually half filled with 

 water and drowned insects. Var. HETEROPHYLLA (Eat.) Torr., has greenish 

 yellow flowers and no purple veins in the foliage. With the typical form. 



2. S. ftava L. (TRUMPETS.) Leaves long (3-10 dm.) and trumpet-shaped, 

 erect, with an open mouth, the erect hood rounded, narrow at the base ; wing 

 almost none ; flower yellow, the petals becoming long and drooping. Bogs, Va. 

 and south w. Apr. 



DROSERACEAE (SUNDEW FAMILY) 



Bog-herbs, mostly glandular-haired, with regular hypogynous flowers, pen- 

 tamerous and withering-persistent calyx, corolla, and stamens, the anthers fixed 

 by the middle and turned outward, and a l-celled capsule with twice as many 

 styles or stigmas as there are parietal placentae. Calyx imbricated. Petals 

 convolute. Seeds numerous, anatropous, with a short and minute embryo at the 

 base of the albumen. Leaves, in bud, rolled up from the apex to the base as 

 in Ferns. Small family of insectivorous plants. 



1. DR6SERA L. SUNDEW 



Stamens 5. Styles 3, or sometimes 5, deeply 2-parted so that they are taken 

 for 6 or 10, slender, stigmatose above on the inner face. Capsule 3(rarely 5)- 

 valved ; the valves bearing the numerous seeds on their middle for the whole 

 length. Low perennials or biennials ; the leaves, in our species, all in a tuft at 

 the base (often scattered in submersed plants), clothed with reddish gland- 

 bearing bristles ; the naked scape bearing the flowers (rarely solitary) in a" 

 1-sided simple (or sometimes forking) raceme-like inflorescence, which nods at 

 the undeveloped apex, so that the fresh-blown flower (which opens only in sun- 

 shine) is always highest. The plants yield a purple stain to paper. The glands 

 of the leaves exude drops of a clear glutinous fluid, glittering like dew-drops 

 (whence the name, from 5poo-ep6s, dewy). 



Leaf-blades linear to orbicular, usually distinct from the petioles. 

 Scapes glabrous. 

 Leaf-blades as broad as or broader than long ; seeds spindle-shaped, with 



a loose testa 1. D. rotundifolia. 



Leaf-blades distinctly narrower than long. 

 Seeds spindle-shaped, the testa loose and produced at the ends ; stipules 



adoate 1. D. anglica. 



Seeds ellipsoid or ellipsoid-ovoid, with a close testa. 



Leaf-blades spatulate or spatulate-oborate ; stipules nearly free . . 3. D. longifolia. 

 Leaf-blades linear ; stipules adnate to the petioles . . . .4. D. linearix. 



Scapes glandular ; seeds ellipsoid, with a close testa 5. D. brtfifolia. 



Leaves filiform, with no distinction of blade and petiole 6. D.fiUformis. 



1. D. rotundifolia L. (ROUND-LEAVED S.) Leaves suhnrbicriar or trans- 

 versely broad-elliptic, abruptly narrowed into the spreading hairy petioh .> ; 

 scape 1-3 dm. high, 1-25-flowered ; flowers white (rarely pinkish), 4-7 mm. 

 broad, the parts sometimes in sixes ; seeds very slender, chaff-like. Common 



