MEMOIRS FROM THE DEPARTMENT OF BOTANY OF COLUMBIA UNIVERSITY 205 
California : 8. B. Parish, No. 1818, 1886, from the San Bernardino Mountains. 
13. CHAMAERHODOS Bunge. 
Sibbaldia L. Sp. Pl. 284. In part. 1753. 
Chamaerhodos Bunge, in Ledeb. Fl. Alt. 1: 429. 1829. 
Hypanthium cup-shaped, small. Petals and sepals 5 ; bractlets wanting. Petals 
obovate or cuneate, somewhat clawed. Stamens 5, opposite the petals; filaments subu- 
late, short, persistent; anthers didymous, opening by a slit. Pistils 5-10, or more; style 
basal, filiform. Seed inserted near the base of the style, ascending and nearly orthot- 
ropous. 
Small biennial or perennial, branching plants, generally elandular-pubescent and 
with finely dissected leaves and dichotomous cymes. The genus consists of about half 
a dozen species, all natives of Northern Asia, one also extending into northwestern 
America. 
1. Chamaerhodos erecta (L.) Bunge. 
Sibbaldia erecta L. Sp. Pl. 284. 1753. 
Sp. Pl. Ed. 2: 407; Willd. Sp. Pl. 1: 1567; Pers. Syn. PI. 1: 341; Spreng. Syst. 
1: 956: DC. Prod. 2: 587; Roem. & Schult. Syst. 6: 769; Dietr. Syn. Pl. 2: 1020; 
Pursh, Fl. Sept. Am. 211. 
Chamaerhodos erecta Bunge, in Ledeb. F]. Alt. 1: 480. 1829. 
Don, Gard. Dict. 2: 562; Walp. Rep. 2: 37; Ledeb. Fl. Ross. 2: 33. 
Torr. & Gray, Fl. N. Am. 1: 433; Torr. Nicol. Rep. 149; Gray, Bae: Re Rs ep: 
12: 43; Proc. Acad. Phil. 1863: 61; Porter, Hayd. Rep. 1871: 431; Porter & Coult. 
Fl. Col. 35; Coult. Man. Rocky Mts. 86; Rothrock, Bot. Wheeler Surv. 114. 
Sibbaldia erecta var. parviflora Nutt. Gen. 1: 207. 1818. 
Eat. & Wr. N. Am. Bot. 424. 
Chamaerhodos erecta var. Nuttallii Torr. & Gray, Fl. N. Am. 1: 443. 1840. 
Innusrrations: Lam. Ill. p/. 221, f. 2; Amman, Ruth. pl. 15. Puare 112, f. 6; dis- 
section of flower, f. 7; pistil, f. 8; stamen, f. 9; fruiting hypanthium and: calyx, ij. 10: 
Plant 1-3 dm. high, erect, branching and leafy, hirsute and glandular. Basal 
leaves numerous and rosulate, 2-4-ternately divided into linear or oblong divisions. 
Stem leaves also numerous, similar but smaller and less divided. Hypanthium 2-3 
mm. in diameter, hispid; sepals narrowly lanceolate, equalling or somewhat shorter than 
the white obovate-cuneate petals. 
Rather common on the dry plains of northwestern America from Saskatchewan to 
South Dakota, Wyoming and northwestward. Also common in Siberia. 
