368 



ERICACEAE. 



naked corymb. Calyx 5-parted. Corolla rotate, choripetalous; petals 

 5, orbicular, concave. Stamens 10; filaments dilated and hairy in 

 the middle. Stigma orbicular-peltate, crowning the very short style 

 which is concealed in the umbilicate summit of the ovary. Capsule 

 dehiscent from above downwards. (Greek cheima, winter, and phileo, 

 to love, the plants evergreen.) 



1. C. Menziesii Spreng. Menzies Pipsissewa. More or less 

 branched from the base, 3 or 4 in. high; leaves ovate, 1 in. or rather 

 less in length, sometimes purplish beneath, often mottled or veined 

 with white above; peduncles 1 to 3-flowered; bracts ovate or roundish; 

 flowers 3 lines in diameter; filaments villous on the dilated middle 

 portion. 



Pine woods of the Sierra Nevada. Rare in the Coast Ranges: 

 Mendocino Co.; Mt. Hamilton. San Bernardino Mountains. 



C. umbellata Nutt. Prince's Pine. Nine to 14 in. high; leaves 

 oblong, 1^ to 2\ in. long, often widest near the apex and tapering 

 gradually to the base, bright green, not variegated; filaments hairy on 

 the margins only. — Mendocino Co. to Mt. Shasta. 



2. PYROLA L. WlNTERGREEN. 



Perennial acaulescent herbs from slender rootstocks, leafless or with 

 radical evergreen leaves. Flowers 5-merous, in a raceme on a naked 

 or sparingly scaly-bracted scape. Corolla choripetalous. Petals 

 concave or incurved, more or less converging. Stamens 10; filaments 

 subulate, naked. Stigma 5-lobed or -toothed, surrounded by a ring. 

 Capsule depressed-globose and 5-lobed. umbilicate at apex and base, 

 dehiscent from the base upward; edges of the valves cobwebby when 

 opening, persistent on the axis. Embryo minute. (Diminutive of 

 Pirus, classical name of the Pear Tree, on account of resemblance in 

 the leaves of one species.) 



1. P. aphylla Smith. Leafless parasite; stems red, often many 

 and clustered, from a scaly-bracted rootstock, 8 to 16 in. high; calyx 

 red, its lobes triangular-ovate, \ the length of the obovate or elliptic 

 whitish petals; capsule 3 lines broad, its sutures somewhat cobwebby 

 in dehiscence. 



Rare in our district: Mt. Tamalpais; Howell Mountain, Tracy; 

 Mt. St. Helena; and northward to Mt. Shasta. Also in the Sierra 

 Nevada. The following species have a cluster of radical leaves and 

 (except the last) a long declined and recurved style. 



P. picta Smith. " White-veined Shin-leaf. Leaves ovate or 

 elliptic, very coriaceous, mottled or veined with white; petiole 

 narrowly winged; calyx-lobes broadly ovate; corolla greenish white 

 or brownish. — Pine forests from Mendocino Co. to Mt. Shasta and 

 southward in the Sierra Nevada. 



P. rot undi folia L. var. bracte ata Gray. Leaves orbicular 

 and comparatively thin, unmottled, on slender unwinged petioles as 

 long as the blade; calyx-lobes triangular-lanceolate; corolla rose- 

 purple. — With the preceding. 



P. secunda L. Leaves ovate, thin -and greenish; flowers white. 



