PLUMBAGINACE.E. (LEADWORT FAMILY.) 71 



6. CHIMAFHILA, Pursh. PTPSISSEWA. 



Corolla of rotately spreading, orbicular and concave petals. Stamens 10. Style very 

 short, inversely conical, nearly immersed in the depressed ovary; stigma broad, its border 

 somewhat 5-crenate. 



C. umbellata, Nutt. A nearly herbaceous evergreen, 6 to 18 inches high; the usually 

 whorled leaves oblanceolate, bright green; peduncle bearing 3 to 7 white or flesh-colored, 

 waxy flowers. Mt. St. Helena, Miss E. Swett. 



7. PYROLA, Tourn. 



Corolla of 5 concave and converging petals. Stamens as in Chimaphila. Style gen- 

 erally long; stigma 5-lobed or 5-rayed. Low and smooth perennial herbs, with broad 

 and petioled leaves, close to the ground, and more or less scaly-bracted scape bearing a 

 simple raceme of white, greenish or rose-colored, nodding flowers. 



1. P rotundifolia, L. Leaves orbicular, varying to round-obovate or round-reni- 

 fonn, on slender, naked petioles; scape 6 to 14 inches high; probably our plants are of the 

 Var. bracteata, Gr. A large form, with leaves 2 or 3 inches long; scape often over a 

 foot high. 



2. P. picta, Smith. Leaves thick, coriaceous; pale, sometimes purplish below; com- 

 monly blotched with white, ovate to obovate and lanceolate-oblong, on short petioles, 1 

 to 2 inches long; smaller than the last. 



8. PTEROSPORA, Nutt. 



Calyx deeply 5-parted, short, persistent. Corolla withering-persistent, globular-ovate, 

 with contracted mouth; the 5 very short lobes, recurved. Stamens 10, included, short; 

 stigma 5-lobed. 



1. P. andromedea, Nutt. A stout, purplish-brown or chestnut-colored and 

 clammy-pubescent herb, 1 to 3 ft. high; raceme long, many-flowered; corolla white, 3 

 lines long. 



BARCODES SAN GUINEA, Torr. The SNOW PLANT of the Sierra Nevada belongs here. 



ORDER 34. PLUMBAGINACE^E. 



Chiefly maritime herbs, with regular flowers, the parts in fives; the stamens opposite 

 the petals. Calyx tubular or funnel-form, 5-plaited, 5-toothed, persistent. Corolla in 

 our genera with the long-clawed petals scarcely united. Stamens adnate to the base of 

 the petals. 



Flowers in a globose head on a simple scape. Armeria. 1 



Flowers on a branching scape Statice. 2 



