A. americanum Nutt. ———> Stems slender, 6-10 cm. tall, forming dense 
tufts gs, commonly 1-1-5 mm. thick, greenish yellow, much branched, either 
dichotomously or with several branches spreading from a single node; staminate 
flowers nearly all terminal, paniculate, not crowded into spikes; pistillate 
flowers terminal and opposite; fruit 5.5-4 mm. long, reflexed at maturity. 
On Pinus contorta. 
Kootenai Co., Sandberg 9358; Rathdrum, Sandber 892; 
Lake Coeur d'Alene, Henderson 4600; 
@ A. Campylopodum #ngelm. ————> Densely tufted, stems stout, 6-10 cm 
t 
&ll, 2-5 mm. thick, brownish yellow or olive brown, branching paniculately, 
the two secondary branches short, commonly terminating in an inflorescence; 
staminate flowers in a cylindrical imbricated spike 1-1.5 cme long, 2-2.5 mm. 
thick, the flowers partially sheathed by the scales; pistillate flowers 
crowded at first, becoming — in fruit; fruit 4-5 ‘ee: 2 tones Pinus 
ponderosa s rarely on P. contort a, MABE NOES destructive (f ril 
Spokane Bridge, Kootenai Co., Heller 925; near Ft. Coeur d'Alene, 
Watson 353. 
— ee 
A, compviopodun forma tsugensis (Rosendahl) Gille A biolorical strain 
—— ee 
' . ia . a We a : aie aye it stanha 
linit:ed to vest rm svecceics of Tsuga, sometimes causing large “witches! 
brooms". ~~Clearmter =e, on T, heterophylla; Cocur d'Alene .-tse, on 
/ = <1 \ 
T Pen ae . as ee Oy a cea ee 7 
t,. Wertensiena (both fide Gill). 
ee ene ee er ee ee 
ee re 
