Part 1, 1905] PARNASSIACBAE '^^ 



6. Parnassia palustris L- Sp. PI. 273. 1753. 



Rootstock short, erect. Petioles of basal leaves 1-6 cm. long; blades cordate, 1-3 cm. 

 wide ; scape 1-3 dm. high; bract ample, often as large as the basal leaves, ovate or cordate, 

 more or less clasping, inserted at or usually below the middle of the scape ; sepals oblong 

 or elliptic, 4-6 mm. long; petals oval, 8-12 mm. long, with 5-9 principal veins; filaments 

 ^bulate, 4-6 mm. long ; staminodial scales with 9-15 filiform filaments ; capsule ovoid, 



about 1 cm. long, 4-valved. 



Type locality: Europe. 



Distribution : lyabrador to Quebec, Michigan, Minnesota, Wyoming and Alaska ; also in 

 Europe and northern Asia. 



Illustrations : Fl. Dan. pi. 584; Sv. Bot. pi. 172; Engl. Bot. pi. 82; Baxter, Brit. Bot. pi. 

 70; Fl. Deutsch. ed. 5, pi. 139 ; Britt. & Brown, 111. Fl./. 1855. 



Parnassia palustris tenuis Wahl. Fl. I.app. 74. 1812. A small variety, 1 dm. high or less, with 

 small leaves and flowers, the petals being about 8 mm. long. Arctic America and Scandinavia. 



7. Parnassia montanensis Fernald & Rydb. sp. nov. 



Rootstock short and erect. Petioles of basal leaves 1.5^ cm. long ; blades ovate with a 

 subcordate or rounded base, 1-2 cm. long, 8-18 mm. wide ; scape about 2 dm. high ; bract 

 ample, ovate, subamplexicaul and subcordate at the base, borne below the middle of the 

 scape ; hypanthium obconic, fully half as long as the sepals and nearly as wide as high ; 

 sepals oblong to lanceolate, acute, 7-9 mm. long, 7-9-veined ; petals oval to elliptic, only 

 slightly exceeding the sepals, with 5-7 veins ; filaments subulate, about 5 mm. long ; stam- 

 inodial scales with 7-9 gland-tipped filaments ; capsule rounded-ovoid, about 1 cm. long, 

 4-valved . 



Type from Sixteen-mile Creek, Montana, July 12, 1883 ^F. L, Scribner 54') . 

 Distribution : Wet river-banks, Montana and Alberta. 



8. Parnassia parviflora DC. Prodr. 1 : 320. 1824. 



Rootstock short, erect. Petioles of basal leaves 1-5 cm. long ; blades oval or ovate, 

 narrowed at the base, 1-3 cm. long, 0.75-2 cm. wide ; scape slender, 1-3 dm. high ; bract 

 ovate, sessile below the middle of the scape ; sepals oblong, 5-8 mm. long ; petals elliptic 

 or oval, sessile, entire, 6-10 mm. long, 5-7-nerved ; filaments subulate, 7-8 mm. long ; 



staminodial scales with 5-7 filiform filaments ; capsule ovoid, about 1 cm. long. 



Type locality : North America. 



Distribution : Labrador to Quebec, South Dakota, Colorado, Utah and Athabasca. 



Illustrations : Hook. Fl. Bor. Am. pi. 27, f. B ; Britt. & Brown, 111. Fl. /. 1856. 



9. Parnassia Kotzebuei Cham.; Spreng. Syst.'l : 951. 1825. 



Rootstock very short, erect. Petioles of the basal leaves 1-2 cm. long or less ; blades 

 broadly ovate or somewhat cordate, 1-2 cm. long ; scape slender, about 1 dm. (seldom 2 

 dm.) high ; bract none, or inserted very close to the base of the scape ; filaments subulate, 

 about 2.5 mm. long; staminodial scales short, with 3-5 filiform short filaments; sepals 

 oblong, 3-veined, 5-7 mm. long, equaling or exceeding the elliptic or oval 3-veined petals ; 

 capsule ovoid, about 12 mm, long and about twice as long as the petals. 



Type locality : On Eschscholtz's Bay, near the Arctic Circle, northwestern America. 

 Distribution : Greenland and Ivabrador to Quebec, Alberta, Wyoming, Alaska and the Arctic 

 coast ; also northeastern Asia. 



Illustrations : Fl. Bah. pi. 2286 ; Hook. Fl. Bor. Am. pi. 28 ; Britt. & Brown, 111. Fl./. 1854 



10. Parnassia grandifolia DC. Prodr. 1 : 320. 1824. 



Parnassia caroliniana p Hook. Jour. Bot. 1 : 194. 1834. 

 Parnassia grandiflora Raf. Aut. Bot. 41. 1840. 



Rootstock short, erect or ascending. Petioles of basal leaves 3-15 cm. long; blades 

 thick and firm, round, oval or ovate, usually subcordate at the base, 3-10 cm. long, 2-8 

 cm. wide ; bract ovate to reniform, usually borne below the middle of the scape ; sepals 

 oval or elliptic, 4-5 mm. long, 3-7-veined; petals elliptic to oval, 15-20 mm. long, with 

 about 7 strong veins ; filaments 7-8 mm. long, subulate ; anthers ovate, acute, about 3 mm. 



