168 



ROSACEAE 



Rocky desert slopes, 3400 to 9500 feet : east slope of the Sierra Nevada from 

 Inyo Co. to Shasta Co.; Panamint Range; White I\Its.; Warner Mts. North to 

 southern Oregon, east to Wyoming and Arizona. June- Aug. 



Locs. — Telescope Peak, Panamint Range, Jcpson 7025; Timosea Peak, Inyo Co., Jcpson 

 5081; Kearsarge Mill, w. of Independence, Jcpson 874; Silver Canon, White Mts., Jepson 7408; 

 Deadnian's Creek, Mono Co., Congdon; Dana (lava fields ne. of), no. Shasta Co., Jepson 5765; 

 McArthur, Shasta Co., Kate Stirring; Black Knob, Modoc Co., L. S. Smith 1012. 



Refs. — Chamaebatiakia millefoliu.m Maxim. Acta Hort. Pctrop. 6:225 (1879); Jepson, 

 Man.480, fig. 475 (1925). Spiraea viille folium Torr.Fac.n.'Rep. 4:83 (1857), type loc. Williams 

 Mts., Ariz., Bigclow. Chamaehalia foliolosa Newberry, Pac. R. Rep. 6:73 (1857), not Benth. 

 Sorbaria millefolium Focke; Engler & Prantl, Nat. Pflzfam. 3*: 16 (1888), Basilima millefolium 

 Greene, Fl. Fr. 57 (1891). Chamaebatiaria glutinosa Rydb. N. Am. Fl. 22:258 (1908), type loc. 

 Ellsworth, Nye Co., Nev., M. B. Howard. Spiraea glutinosa Fedde, Just Bot. Jahrb. 36-:489 

 (1910). 



6. LUETKEABong. 



Low herb-like plant, the woody stems decumbent or creeping, the flowering stems 

 erect, ending in a raceme. Leaves biternately parted into linear lobes. Stamens 

 about 20 ; filaments united at base. Pistils 5 ( or 4 or 6 ) . Pods coriaceous, 2-valved. 

 — Species 1. (Count F. P. Luetke, 1797-1882, commander of a Russian exploring 

 expedition in the arctic.) 



1. L. pectinata Ktze. Partridge Foot. Flowering stems 4 to 5 inches high ; 

 herbage glabrate; leaves 5 to 7 lines long, including the broad petiole; racemes i/^ 

 to 21/2 inches long; flowers 3 to 3^/2 lines 

 broad; petals white, orbicular or roundish- 

 ovate. 



High slopes where winter snow-banks 

 have melted, often carpeting the ground 

 along streams or about springs, 7000 to 9000 

 feet : Siskiyou Co. North to Alaska. Aug. 



Locs. — Mt. Shasta (N. Am. Fauna 16:149); 

 summit above Cold Spr., w. fork Woolly Creek, Siski- 

 you Co., Butler 223. 



Refs. — Ltjetkea pectinata Ktze. Rev. Gen. 

 PI. 1:217 (1891) ; Jepson, Man. 480 (1925). Saxi- 

 fraga pectinata Pursh, Fl. 312 (1814), type loc. 

 "Northwest Coast," Menzies. LuetTcea sibbaldioides 

 Bong. Veg. Sitch. 130, t. 2 (1832). Eriogynia pec- 

 tinata Hook. Fl. Bor. Am. 1:255 (1834). Spiraea 

 pectinata T. & G. Fl. 1:417 (1840). 



7. ARUNCUS L. Goat's Beard 



Tall perennial herbs. Leaves two or 

 three times pinnate, without stipules. Flow- 

 ers white, dioecious, borne in long slender 

 spikes, the spikes disposed in a large com- 

 pound panicle. Follicles usually 3, at length 

 reflexed, commonly 2-seeded. — Species 2, 

 North America, Europe, and Asia. (Latin 

 aruncus, the beard of a goat, says Pliny.) 



1. A. Sylvester Kost. var. acuminatus 

 Jepson comb. n. Goat's Beard. (Fig. 162.) 

 Stems erect, 2 to 5 feet high, herbage gla- 

 brous; leaflets thin, ovate or oblong-lanceolate, irregularly serrate, acuminate, 1^ 

 to 5 inches long; flowers 1 line wide; petals obovate; stamens much exserted. 



Along shady streams in canons, 500 to 4800 feet: northern Humboldt Co.; 

 Trinity, Shasta, Siskiyou and Del Norte Cos. North to Alaska. May- Aug. 



Fig. 162. Aruncus Sylvester Kost. 

 var. acusiinatus Jepson. a, leaf, X Vs; b, 

 part of infl., X ^4 ; c, fl., X 2 ; d, f r. spike, 

 X Vi ; e, f r. carpels, X 2. 



