86 PAPAVERACEiE. Arctomecon. 



Proc. Biol. Soc. Wash. vii. 66, 67, & Coutrib. U. S. Nat. Herb.iv. 58, 59.^ [By 

 B. L. Robinson.] 



* Capsule obovoid. 



A. humilis, Coville. Low, 4 to 7 inches in height, erect leaves oblanceolate, usually 

 2-3-deutate toward the apex, hirsute-ciliate and sparsely villous : scapes naked and one- 

 flowered or more frequently stems bejiring a pair of subopposite leaves and 2-3-flowered : 

 petals 4, suborbicular, white, three fourths inch in diameter : filaments flattened and slightly 

 dilated : capsule 4 lines or more in length, two tliirds as broad, splitting about to the middle : 

 style short but present. — Proc. Biol. Soc. Wash. vii. 67, & Contrib. U. S. Nat. Herb. iv. 58. 

 A. Californicum, Gray, Proc. Am. Acad. xii. 53 (so far as Dr. Parry's plant is concerned), 

 t. 2, not Torr. & Frem. — Desert of S. W. Utah, on the Rio Virgen, Parri/, no 6. 



A - Californica, Torr. & Frem. 1. c. Taller and much more densely clothed with long 

 gray barbellate hair : leaves crowded at the base of the plant, oblanceolate in outline or 

 flabelliform-cuneate and several toothed at the apex : stem about a foot high bearing about 

 two alternate distant reduced leaves and an umbelliform clu.ster of several to many slender- 

 peduncled successively opening flowers : filaments slender : stigma sessile. — Coville, Con- 

 trib. U. S. Nat. Herb. iv. 58. — S. Nevada, first collected by Fremont, rediscovered in the 

 same locality near Vegas Ranch, Lincoln Co., by Di: Merriam & V. Bailey. 

 * * Capsule linear-oblong. 



A. Merriami, Coville. Foliage and pubescence much as in the last, but flowers usually 

 solitary : sepals 3, villous, caducous : petals 6, white, obcordate, more than an inch in 

 diameter : filaments slender but slightly dilated upward : capsule narrow, an inch and a 

 half or more in length. — Proc. Biol. Soc. Wash. vii. 66, «& Contrib. U. S. Nat. Herb. iv. 59. 

 — Near the same locality as the preceding. Dr. Merriam & V. Bailey, May, 1891, no. 1890. 



5. SANGUINARIA, Dill. Bloodroot. (Named from the blood-red 



juice.) — Hort. Elth. ii. 334, t. 252 ; L. Gen. no. 425. — Single species, vernal. 



S- Canadensis, L. Rootstock horizontal, fleshy and tuberous, crimson-red, surcharged as 

 also the glabrous partly glaucous herbage with orange-red acrid juice, sending up in early 

 spring, from terminal 2-3-valved buds a long-petioled leaf and a 1-flowered scape : leaves 

 reniform, palmately and obtusely .5-9-lobed, reticulated : lobes repand-dentate or 3-lobed : 

 scape a span high, naked (has been found with a pair of opposite bracts and 3 flowers'^) : 

 petals inch or less long, white, sometimes tinged with rose: capsule 2 inches long. — Spec. 

 i. 505 ; Lam. 111. t. 449 ; Curtis, Bot. Mag. t. 162 ; Bigel. Med. Bot. i. 75, t. 7 ; Lodd. Bot. 

 Cab. t. 1840; Torr. & Gray, Fl. i. 62; Gray, Gen. 111. i. 116, t. 49 ; Sprague & Goodale, 

 Wild Flowers, 141, t. 33. S. acaulis, Mcench, Meth. 227. S. vernalis, Salisb. Prodr. 376. 



5. grandi flora. Sweet, Brit. Fl. Gard. ser. 2, t. 147. — Woods in rich soil. Nova Scotia to 

 Manitoba, and south to Arkansas and Florida. 



6. DENDROMECON, Benth. {Mvhpov, tree, ixtjkwv, poppy.) — Trans. 



Hort. Soc. ser. 2, i. 407 ; Benth. &, Hook. Gen. i. 54 ; Hook. Ic. t. 37, & Bot. 



Mag. t. 5134; Torr. Bot. Mex. Bound. 32, t. 3. — Single species, polymorphous 



in foliage, yellow-flowered, in spring. 



D.* rigida, Benth. 1. c* Glabrous and rigid shrub ; leaves pale or glaucescent, coriaceous, 

 lanceolate and cuspidate-acuminate, varying to oblong and obtuse with rigid mucro, entire 

 or ciliolate-denticulate on callous margins (those of seedlings sligiitly lobed), very reticulate- 

 veiuy and venulose and with strong midrib, short-petioled, in age falling by an articulation : 

 flowers naked-])eduiiculate at apex of branchlets : sepals orbicular : petals very broad, about 

 inch long, golden yellow : capsule commonly arcuate at maturity. — Torr. & Gray, Fl. i. 64 ; 



1 In the light of Mr. Coville'.s recent discoveries, and more coi)iou.s material secured on the Death 

 Valley Exploring E-xpedition, it lias been necessary to rewrite the treatment of this genus. 



2 A second interesting anomalous form is described by A. Foerste (Bull. Torr. Club, xiv. 74, 

 t. 67), in which but two flowers are present and these alternate. 



3 Description slightly modified to exclude the following species. 



