BROOM-RAPE FAMILY. 



421 



Herbage dark reddish brown; flowers subsessile or short pediceled; calyx 



unequally cleft; stems with a thickened tuber-like base 



5. A. tuberosum. 



1. A. uniflorum (L.) Gray. Naked Broom-rape. Peduncles 

 few or one, slender, 1£ to 5£ in. high, from a short scaly nearly sub- 

 terranean stem; calyx-lobes subulate, often attenuate, longer than the 

 tube; corolla violet-tinged or blue-purple, 1 in. long or less (twice the 

 length of the calyx or more), the lobes obovate and rather large. 



Widely distributed but not common: Lafayette, Contra Costa Co.; 

 Milliken Canon near Napa. Apr. -May. 



2. A. fasciculatum (Nutt.) Gray. Scaly stem emerging from the 

 ground 1 or 2 in. and bearing numerous fascicled peduncles 3 to 4 in. 

 long; plants more pubescent and glandular than in no. 1; calyx-lebes 

 broadly or triangular-subulate, usually shorter than but often exceed- 

 ing the tube; corolla yellow, sometimes purple or reddish-tinted, 1 to 

 1£ in. long. 



Higher mountain slopes and ridges, rather common: Coast Ranges 

 (Vaca Mountains, Mt. Tamalpais, Mt. Diablo, Mt. Oso, etc.); Sierra 

 Nevada; Southern California. June. Parasitic on Eriogonum. 

 Phacelia, Artemisia, etc. 



3. A. comosum (Hook.) Gray. Branching close to the surface of 

 the ground, 3 to 4 in. high, puberulent; flowers racemose or some- 

 what corymbose; pedicels 2 to 4 lines long; bractlets on the pedicels 

 or at the base of the flowers; calyx parted into long linear-attenuate 

 lobes | as long as or nearly equaling the corolla; corolla pinkish or 

 purplish, 1 to lh in. long, upper lip notched or bifid, lower 3-parted 

 into rather narrow lobes; anthers woolly. 



Dry hills, parasitic on Artemisia and other shrubs, not common. 

 Mohave Desert northward to Washington: Mt. Oso, Stanislaus Co., 

 Brewer; Livermore, on Sambucus glauca, Dr. W. A. Hammond, the 

 specimens nearly a foot long and the main stem 1 in. thick; bractlets 

 somewhat remote from the calyx; very abundant in "the low over- 

 flowed lands between the San Joaquin River and Paradise Cut. - ' 

 Brondegee. Aug. -Sept. 



4. A. Californicum (C. & S.) Gray. Viscid-pubescent, with 

 usually simple stems 2 to 6 in. high; flowers crowded in a dense 

 raceme; pedicels 1 to 2 (or the lower sometimes 6) lines long; calyx- 

 segments linear-lanceolate, half as long as the corolla; corolla yellow- 

 ish or purplish, £ to 1 in. long, its lobes shorter and less spreading 

 than in no. 3; anthers glabrous or slightly hairy. 



Open hills: Coast Ranges; Sierra Nevada. Corolla rather more 

 slender and less membranaceous than in A. comosum; lips about 2 

 lines long, in A. comosum about 3 to 4 lines long. 



5. A. tuberosum Gray. Low, stout, pruinose-puberulent, the 

 thickened base of the stem with imbricated scales; inflorescence a 

 dense pyramidal (or more or less globose) cluster of short racemes; 

 calyx unequally cleft, the lobes about as long as the tube of the 

 corolla: corolla yellowish or dark purple or brown. 5 to 7 lines long, 



