VALEEIANACEAE (VALEKIAN FAMILY) 475 



globose; seeds longitudinally wrinkled. — ^From our range eastward to the 

 A.tlantic. 



LAURENTIA Micheli. '. 



Low herbs, resembling small species of Lobelia excepting the closed tube of 

 the corolla. Flowers blue. Calyx-tube turbinate or oblong. Corolla with its 

 tube as long as the litnb; Capsule short, 2-valved at the summit. 



1. Laurentia exunia A. Nels. Perennial, the simple stems about 1 dm. 

 high, internodes short: lower leaves narrow, tapering from the dilated base, 

 15-25 mm. long; the floral somewhat broader: flowers few, from the axils of 

 the crowded uppermost leaves, on short peduncles: sepals foliaceous, 6-8 mm. 

 long: corolla deep blue; the upper lip of 2 oblong-erect lobes about as long as 

 the tube; the lower of 3 ovate lobes longer than the tube, somewhat depressed, 

 and with 2 narrow yellow plicae in the throat: capsule , obconical, many- 

 seeded. L. camostda. {PoTterella eximia A. l^els. Bull. Torr. Bot. Club 27 : 270. 

 1900.) — Banks of ppnds; northwestern Wyoimng; probably throughout our 

 range. ' ' ' 



lis. VALERIANACEAE Batsch. Valerian Family 



Herbs with opposite leaves and no stipules, and usually small perfect or 

 polygamous flowers in corymbed or capitate cymes. Calyx-tube adnate to the 

 ovary.. . i Corolla tubular or funnelform, mostly 5-lobed. Stamens 1-4, inserted 

 on the corolla-tube. Ovary inferior, 1-3-celled, one of ,the cells containing a 

 single suspended ovule, the others empty. 



VALERIANA L. Valerian 



Roots of peculiar scent. Leaves various. Flowers white or rose-colored. 

 Calyx-liinb of 5-15 setiform lobes, which are inroUed and inconspicuous until 

 fruiting. Stamens 3. 



Leaves nerve-veined, usually thick, entire or with entire linear divi- 

 i sions. 



Ovaries and fruits pubescent 1. V. ceratophylla. 



Ovaries and fruits glabrous : ■' . . 2. V. furfurescens. 



Leaves pinnately veined, usually thin, and often pinnate; 



Ovaries and fruits pubescent . . . . ' . . . 3. V. micrantha. 



Ovaries and fruits glabrous . : , . . . . . . 4. V. acutiloba. 



i: Valeriana ceratophylla (Hook.) Piper, Contrib. U. S. Nat. Herb. 11 : '532. 

 1906. Erect from a large, fusiform, perpendicular stock branching below into 

 deep and thickened roots; stem 7-20 dm. or. more high; leaves thicjdsh, 

 nervosely vei,ned, not serrate, sUghtly pubescent; radical leaves oblanceolate 

 to spatulate, tapering into a margined petiole, entire or some sparingly 

 lacimate-pinnatifid; cauline rarely hone, commonly 1 or 3 pairs, sessile, and 

 pinnately parted into 3-7 linear or lanceolate divisions, or terminal one spatu- 

 late : flpwers polygamo-dioeoious, yelloTyish-wJtut^, sessile in the cymules, which 

 form an elongated, thyrsiform, naked panicle. V. edvMs. — New Mexico and 

 Arizona, northward and eastward. ' '■ 



2. Valeriana furfurescens A. Nels. Bull. Torr. Bot. Club 28: 232. 1901. 

 Similar, the root slender, only 1-3 cm. in diameter: leaves entire or nearly so: 

 inflorescence usually much elongated, often half the height of the plant; flowers 

 very numerous, minute: corolla 1-1.5 mm. long, greenish-yellow: fruit 3-4 mm. 

 long, ovate, compressed, glabrous but often slightly scurfy rugulose. (F. 

 trachycarpa Rydb. Bull. Torr.. Bot. Club 31: 645. 1904.)— Moist ^ali^e 

 meadows; Colorado and Wyoming. i< 



3. Valeriana micrantha E. Nels. Erythea 7: 166. 1899. Glabrous, erect 

 from creeping rootstocks, 3-8 dm. high: radical leaves entire or with 1 or 2 



