ROSE FAMILY 



167 



A state of var. microphyllus with leaves slightly wider and broadly cuneate or rounded at 

 base is the ti-ifling form H. saxicola Hel.: South Yollo BoUy, Jepson 13,858; Trinity Summit, 

 n. Humboldt Co., Davy 5853 ; Silver Lake, Amador Co., Earl Mulliken 148 ; Kennedy Mdws., East 

 Fork Eelief Creek, Tuolumne Co., Jepson 6549 ; Eound Mdw., Giant Forest, Jepson 688. 



Var. glabrescens Jepson. Diffuse, 1 to 4 feet high; leaf -blades cuneate-obovate, sparingly 

 pubescent or sometimes very hairy, glandular-dotted (especially beneath), 3 to 7 lines long, decur- 

 rent on the short (% to % line) petioles. — Kocky slopes, 3600 to 9400 feet: easterly slopes or east 

 side of the Sierra Nevada from Placer Co. to Modoc Co., thence west to Siskiyou Co. North to 

 Oregon, east to Utah. July-Sept. 



Locs. — Truckee Kiver, Placer Co., Sonne; Brokeoff Mt., Tehama Co., J. Grinnell; Lassen 

 Peak, Jepson 15,327 ; Martin Sprs., Eagle Lake, Brown 4" Wieslander 60 ; Lost Lake, Warner Mts., 

 L. S. Smith 1029 ; Eagle Peak, Warner Mts., Jepson 7962 ; Mt. Bidwell, ne. Modoc Co., Jepson 

 7875 ; Lava ranger sta., w. Modoc Co., L. S. Smith 1448 ; Mt. Shasta, Jepson 13,856 ; Humbug Mt., 

 w. Siskiyou Co., Butler 495 ; Log Lake, Shackelford Creek, w. Siskiyou Co., Butler 283. 



The type locality of var. dumosus Dippel is in Colorado. That form, in this treatment, is 

 excluded from the California flora. 



Eefs. — HoiiODlscus discolor Maxim. Acta Hort. Petrop. 6:254 (1879) ; Jepson, Man. 479, 

 fig. 474 (1925) ia part. Spiraea discolor Pursh, Fl. 342 (1814), type loc. "banks of the Koos- 

 koosky" (Clearwater Eiver, Idaho), Lewis. Schizonotus discolor Eaf. New Fl. 3:75 (1836). 

 Sericotheca discolor Eydb. N. Am. Fl. 22:262 (1908). Spiraea ariae folia Smith; Eees, Cycl. 33: 

 Spiraea no. 16 (1819), type loc. "northwest coast of America," Menzies. Schizonotus ariae folius 

 Greene, Fl. Fr. 58 (1891), in part. Holodiscus ariaefolius Greene, Man. Eeg. S. F. Bay 113 

 (1894). Spiraea discolor var. ariaefolia Wats. Bot. Cal. 1:170 (1876). Schizonotus argenteus 

 var. ariaefolius Ktze. Eev. Gen. PI. 1 :225 (1891). S. argenteus var. discolor Ktze. I.e. H. discolor 

 var. ariaefolius Jepson, Fl. W. Mid. Cal. 277 (1901), in part, ed. 2, 204 (1911), in part. Schizono- 

 tus discolor var. purshianus Eehd.; Bailey, Cycl. Am. Hort. 4:1627 (1902). Var. franciscantjs 

 Jepson. Sericotheca franciscana Eydb. N. Am. Fl. 22:262 (1908), type loc. San Leandro, L. M. 

 Underwood. Holodiscus franciscanus Eehd. Jour. Arn. Arb. 1:260 (1920). Spiraea discolor 

 B. & W. Bot. Cal. I.e., in part; not S. discolor Pursh (1814). Schizonotus ariaefolius Greene, 

 Fl. Fr. 58 (1891), in part. Holodiscus ariaefolius Greene, Man. Eeg. S. F. Bay 113 (1894), in 

 part. H. discolor var. ariaefolius Jepson, Fl. W. Mid. Cal., I.e., in part, ed. 2, I.e., ia part. Holo- 

 discus discolor Jepson, Man. 479 (1925), in part. Var. microphyllus Jepson. Holodiscus micro- 

 phyllus Eydb. Bull. Torr. Club 31:559 (1904), type loc. Alta, Wasatch Mts., Utah, Jones 1142. 

 Sericotheca microphylla Eydb., N. Am. Fl. 22:264 (1908). Spiraea discolor var. dumosa Wats. 

 I.e., in part. Holodiscus discolor var. dumosus Jepson, Man. 479 (1925). Holodiscus saxicola 

 Hel. Muhl. 1:41 (1904), type loc. Donner Pass, Nevada Co., Heller 7160. Sericotheca saxicola 

 Eydb. N. Am. Fl. 22 : 263 (1908). Spiraea hoursieri Carr. Eev. Hort. 520 (1859), type from Cal. 

 Holodiscus hoursieri Eehd.; Bailey, Cycl. Hort. 3:1498 (1915). Seri- 

 cotheca hoursieri Eydb. N. Am. Fl. 22:263 (1908). Sericotheca concolor 

 Eydb. I.e. 264, type loc. Mt. Davidson, Nov., Torrey 134 (leaves almost 

 equally pubescent on both sides). Var. glabrescens Jepson, Man. 479 

 (1925). Spiraea discolor var. glabrescens Greenman, Erythea 7:116 

 (1899), type loc. Stein's Mt., Ore., Cusicic 1253, 1968. S. dumosa Torr.; 

 Stansbury, Expl. Great Salt Lake 387, pi. 4 (1852) ; not S. dumosa Nutt. 

 (1840). Holodiscus glabrescens Hel. Muhl. 1:40 (1904). Sericotheca 

 glabrescens Eydb. N. Am. Fl. 22:265 (1908). Sericotheca obovata Eydb. 

 I.e. 264, type loc. along Truckee Eiver, Placer Co., Sonne (leaves larger, 

 vUlous-pubescent above). 



5. CHAMAEBATIARIA Maxim. 



Glandular-pubescent and aromatic deciduous shinib. Leaves 

 pinnate, the pinnae pinnately divided into numerous almost 

 distinct minute leaflets. Stipules entire. Flowers large, white, 

 in a terminal racemose panicle. Stamens about 30 to 50, in- 

 cluded. Pods 5, coriaceous, several-seeded, dehiscent down the 

 ventral suture and half way down the back. — Species 1. (Re- 

 sembles Chamaebatia.) 



1. 0. millefolium Maxim. Desert-sweet. (Fig. 161.) 

 Stout, erect, branching, 2^2 to 6 feet high; herbage very frag- 

 rant; axis of inflorescence and pedicels heavily glandular, the 

 foliage less glandular, sparingly soft-pubescent; leaves oblong-lanceolate in outline, 

 1 to 1% inches long; flowers 4 to 6 lines broad; petals orbicular; pods 21/2 lines long. 



Fig. 161. CHAM- 

 AEBATIARIA MILLE- 

 FOLIUM Maxim.; 

 a decompound xe- 

 rophilous leaf type, 

 X 11/3. 



