184 ROSACEA. rubus. 



HOLODISCUS. 



acute, smooth and shining above, sparingly pubescent beneath, 1-2 inches 

 long or more, persistent, the veins beneath and the petioles armed with 

 recurved prickles; stipules a pair ol ovate acuminate lacerate-serrate leaf- 

 lets, contracted at base, situated on the petiole a line or more from the 

 base : peduncles short, one to few-flowered ; flowers perfect; sepals nearly 

 distinct, broadly lanceolate, acuminate, 3-4 lines long, ciliate and more or 

 less pubescent : petals narrowly lanceolate, acuminate, longer than the 

 sepals ; carpels few, pubescent, those that mature becoming large red juicy 

 drupelets ; achenes flattish, a line long, conspicuously pitted. In forests, 

 Washington to Northern Crlifornia and Idaho. 



R. ursinus Cham. & Schlecht. Linnaea ii, 11. Stems slender, trail- 

 ing, 5-20 feet long, armed with straight rather slender prickles, somewhat 

 glaucous: leaves deciduous, 3-foliolate, rarely 5-foliolate, often simple and 

 3-lobed on the flowering branches ; leaflets ovate to oblong coarsely and 

 doubly serrate, more or less pubescent or tomentose, veins, petioles, pe- 

 duncles and calyx more or less armed with prickles ; stipules oblanceolate 

 to linear, often long and toothed : flowers dioecious, in small cymes termi- 

 nating the numerous lateral branchlets or leafy peduncles ; calyx-lobes 

 ovate -lanceolate acuminate or often foliaceously tipped, densely tomen- 

 tose inside, glandular outside ; petals of the staminate flowers lanceolate 

 to obovate, unguiculate, 6-8 lines long, much exceeding the calyx; of the 

 pistilate smaller, but little if at all exceeding the calyx ; carpels numerous, 

 glabrous : fruit oblong to ovoid, black, pleasa.it flavored : aohr-nea 

 small, flattish, reticulated. Common in wooded districts, Alaska to Cali- 

 fornia. 



Tribe 5. Spiraeas Juss. Calyx campanulate, imbricate, or 

 sometimes vahate in the bud: carpels 1-8, mostly 5, verticillate, 

 follicular or 2-valved in fruit: style terminal: seeds 1-8 or 10 in 

 each carpel, pendulous or ascending. 



15 HOLODISCUS Maxim. Act. Hort. Petrop. vi. 



Shrubs with alternate simple leaves without, stipules and nu- 

 merous flowers in loose panicles that terminate the short branch- 

 lets. Flowers perfect, disk wholly coherent. Calyx deeply 5- 

 cleft, persistent. Stamens numerous, perigynous. Carpels 5, op- 

 posite the calyx-lobes, distinct, shortly stipitate, with two pendu- 

 lous ovules, becoming woolly achenes. Stigma capitate, 2-lobed. 



H. discolor Maxim Adn. Spir. 150. Spirxa discolor P»rsh. A diffuse 

 shrub 2-6 feet high with grayish-brown bark and short rigid pubescent 

 branches : leaves ovate, obtuse or acutish, cuneately narrowed at base to 

 a winged petiole, pinnately lobed or toothed above the middle, 6-18 lines 

 long, more or less silky-pubescent beneath, nearly smooth above: panicle 

 small, 1-4 inches long; more or less tomentose; calyx-lobes oblong, acute 

 or acutish ; petals obovate, obtuse, barely a line long, exceeding the calyx, 

 white, changing to tawny-white in age : achenes densely tomentose with 

 long white hairs. Common on bluffs and rocky banks, Brit. Columbia to 

 California and the Rocky Mountains, east of the Cascade range. 



H. ariie folia. Spirxa arixfolia Smith. A rather large shrub 4-16 feet 

 high, with slender spreading or recurved striate branches: leaves ovate, 

 often abruptly contracted below to a short more or less margined petiole, 



1-4 inches long, pinnately lobed, the mostly obtuse lobes often sharply 

 toothed, finely tomentose beneath, smooth above: panicles large and dif- 

 fuse, 4-8 inches long, tomentose, white, changing to tawny; petals oblong, 

 a line long, exceeding the ovate acute calyx-lobes; carpels pubes&eat with 

 long white hairs. Common in forests, Puget Sound to California, west of 

 the Cascade Mountains. 



