VASCULAR PLANTS OF NORTH DAKOTA 475 
Butte, Peninsula of Lake Ibsen, Pleasant Lake, Bismarck. 
Family 80. TILIACEAE Gerard, FI. Galloprov. 436. (1761). 
m TILLA® Plinius 16: 14,24: 8, and all’ of older writers... See 
Virgilius, etc. 
716. Tilia americana Linn. Sp. Pl. 514. (1753). 
Fargo (O. A. Stevens). 
Family 81. COLUMNIFERAE Zinn. Cat. Pl. 151 (1757). 
Malvaceae Necker, Act. Acad. Theod. 2: 487. (1770). 
MALVA Plinius 20: 21. Colum. 10: 247. Geopon 15: 5, 6, 
and all older and later authors. Malache Hesiod. and of Greeks. 
Theophr. Hist. 7: 8. Diosc. 2: 144, etc. Linn. Gen. no. 841. 
Tragus, Hist. 174. (1546) used binary distinctive names 
whenever a genus held more than one species: M. pumila=M. 
rotundifolia; M. hortensis = Alcea rosea; M. sylvestris=M. sylvestris; 
M. arborescens = Lavatera arborea. 
ANALYTICAL KEy. 
iene Plant erect, leavesicrisp, flowerand fruit'sessile..5:.5.2.2.2.. M. crispa. 
II. Plant erect, pedicles erect in fruit, petals 3-4 times longer than the 
calyx, carpels about 10, with flat backs, rugose-reticulate. 
a) Leaves with triangular lobes, petals elongated-cuneiform, emargi- 
nate, reddish violet with dark veins................ M. sylvestris. 
b) Leaves with rounded lobes, petals broadly obcordate, darker, 
AIMOStAMCLIMISON. Les ites ck, cee Parate are ee ake ee M. mauritiana. 
Ill. Plant procumbent, pedicles reclined in fruit, petals at most 
twice as long as the calyx. 
A. Fruiting calyx not enlarging or reflexed. 
a) Bractlets of the involucre lanceolate, % as long as the caiyx lobes, 
which are long-acuminate with propendent pilosity. Petals 1% 
—2 times longer than the calyx, pale blue or pale rosy. The 
center of the fruit 13 of its diam. Carpels rounded on the 
Packs: i —— Gea StmO@ Oeil. a... /< yas tients tac snore ak meambor he M. neglecta. 
b) Bractlets of the involucre sublulate, as long as the calyx lobes, 
which are short-acuminate, with hairs spreading in all directions. 
Petals scarcely longer than the calyx, white. The center of the 
fruit only 1-5 of its diam. Carpels with flat back and sharp angles, 
MOUS OSC Her. eran A OREN RT a ge MPAs A oeene tek A NP Soe tee Bc M. vulgaris. 
B. Fruiting calyx enlarging and becoming reflex-spreading. Petals 
scarcely longer than the calyx, blue. Carpels transversely rugose 
MIM SIO NAR PIESS TO. hcte cacti. BEERS Mas oo heb a M. parviflora. 
717. Malva crispa Linn. Sp. pl. ed. 2: 970. (1763). 
Kulm. Brenckle). 
718. Malva sylvestris Turner, Ger. I. Herb. Suppl. 785. 
