SMITH: STUDIES IN THE GENUS LUPINUS 201 
the L. densiflorus series. Some are labelled “ L. densiflorus,” 
others “ L. microcarpus.” Careful field work is needed here. 
Austrocollium, ‘of the southern foothills,” is from the genitive 
plural of collis, ‘‘foothill,’’ and australis, “southern.” 
6y. Lupinus densiflorus scopulorum var. nov. [FIG. 42.] 
Ad basin ramosus et superne subramosus, caule 20-30 cm. alto, 
villoso, pilis 2-3 mm. longis; petiolis 4-8 cm. longis, conspicue vil- 
losis, foliolis 15-25 mm. longis, oblanceolatis, apice rotundatis vel 
angulatis, subter laxe villosis; pedunculis folia excedentibus vel 
brevioribus, verticillis 3-5, appositis, floribus ad anthesin et postea 
pandentibus, prope 15 mm. longis, pedicellis 2!mm. longis, gracilibus, 
Fic. 42. LUPINUS DENSIFLORUS SCOPULORUM C. P. Smith. J. Macoun (US 
20837). 
bracteis villosissimis, cito reflectentibus marescentibusque; calyce 
ebracteolato, prope 11 mm. longo, labio superiore 2-3 mm. lo 
diverso, interdum integro, snes villosissimo ad anthesi recto 
ad fructum subinflato, 3-4 mm. lato, 2-dentato, sinu lato dentis 
vestigio instructo; petalis pallido- juteolo-albis, vexillo 14mm. longo, 
lato, medio maculato paullatim contracto, apice acuto et 
ungue gracili non claroque, alis 12 mm. longis, 6 mm. latis, non 
ciliatis, carina 10 mm. longa, subrecta; leguminibus prope 14 x10 
mm.: semina matura non vidi. 
Branched at the base and babbranched above, 20-30 cm. tall, 
villous with hairs 2-3 mm. long; verticils three to five, approximate; 
flowers spreading in anthesis and later, about 15 mm. long; bracts 
soon reflecting and withering; calyx without bracteoles, about If 
mm. long, upper lip 2-3 mm. long, entire or variously toothed, 
lower lip very villous, straight in anthesis, slightly inflated in 
fruit, two-toothed, the sinus wide with a vestigial tooth present; 
petals pale yellowish white, banner 14x 6 mm., gradually con- 
