ASCLEPIADACE.22. (MILKWEED EAMILT.) 73 



2. TRIBNTALIS, L. STAB-FLOWER. 



Calyx and wheel-shaped corolla about 7-parted. Filaments slender, spreading. Low 

 and glabrous perennials, with simple stems, which bear a whorl of leaves at the summit, 

 in their axils slender peduncles supporting star-shaped, white or pinkish flowers. 



1. T. Europeea, L., Var. latifolia, Torr. Stems 4 to 8 inches high, springing 

 from a little tuber. 



3. ANAGALLIS, Tourn. PIMPERNEL. 



Divisions of the rotate 5-parted corolla broad. Capsule globose. Spreading, prostrate 

 herbs, with opposite or whorled leaves and axillary flowers. 



1. A. arvensis, L. Leaves ovate, sessile, shorter than the peduncles, sometimes in 

 threes; flowers scarlet, purple, or nearly salmon-colored, rarely blue. 



4. GLAUX, L. SEA MILKWORT. 



Calyx campanulate, 5-cleft; the lobes ovate, petal-like. Filaments rather shorter than 

 the calyx. Style filiform; stigma capitate. 



1. G. maritima, L. Low, glabrous; branching stems 3 to 9 inches high, leafy to 

 the top; leaves commonly opposite, fleshy, oblong, half an inch or less long, minutely 

 dotted; flowers axillary, almost sessile, white or purplish. 



ORDER OLBACB^S is represented by Fraxinus Oregana, Nutt., the OREGON ASH. 



ORDER APOCYNACB^B is represented by Apocynum cannabinum, L. (INDIAN 

 HEMP.) An herb with milky juice, tough bark, opposite entire exstipulate leaves, regular 

 flowers, the sepals, petals and stamens five, the latter borne on the corolla alternate with 

 its lobes and conniving around the stigma. The commonly sessile, oblong leaves often 3 

 or 4 inches long. The greenish- white small flowers in close cymes. A. androscemifolium, 

 L., has smaller ovate leaves, conspicuously petioled; flowers rose-colored. 



OEDEB 36. ASCLEPIADACE-2E. 



Herbs with milky juice, no stipules, and regular flowers, with the parts in fives, except 

 that there are two carpels with distinct ovaries and a common stigma to which the sta- 

 mens are attached; the latter (in our genera) with hood-like appendages. Leaves entire, 

 generally opposite, sometimes whorled. Flowers usually in simple umbels. Fruit a 

 pair of follicles. Seeds almost always with a coma of silky down. 



1. ASC'LEPIAS, L. MILKWEED. 



The calyx and corolla deeply 5-parted; the small divisions reflexed; filaments short, 

 crowned behind each anther with a conspicuous hood from the cavity of which 

 rises the subulate and usually falcate hern; anthers with thin scarious tips inflexed 



