Parr 4, 1908] ROSACEAE 377 
1. Chamaerhodos Nuttallii Pickering, sp. nov. 
Sibbaldia erecta Pursh, Fl. Am. Sept. 211. 1814. Not S. erecta ly. 1753. 
Sibbaldia erecta parviflora Nutt. Gen. 1: 207. 1818. 
Chamaerhodos erecta Hook. Fl. Bor. Am. 1: 196. 1832. Not C. erecta Bunge. 1829. 
Chamaerhodos erecta Nuttallii T. & G. FI. N. Am. 1: 433. 1840. 
Chamaerhodos Nuttallit Pickering; T. & G. Fl. N. Am. 1: 433, as synonym. 1840. 
Plant 1-3 dm, high, erect, branching and leafy, hirsute and glandular; basal leaves 
numerous and rosulate, 2-4-ternately divided into linear or oblong divisions; stem-leaves 
‘also numerous, similar but smaller and less divided ; inflorescence a many-flowered, often 
flat-topped panicle with ascending branches; pedicels erect or nearly so, even in fruit 
scarcely exceeding the flowers in length; hypanthium 2-3 mm. in diameter, hispid; sepals 
narrowly lanceolate, equaling or somewhat shorter than the white obovate-cuneate petals. 
TYPE LOCALITY: Near the Mandan villages [Dakota]. 
DISTRIBUTION : From Saskatchewan to South Dakota, Wyoming, and Alaska. 
ILLUSTRATIONS: Mem. Dep. Bot. Columbia Univ. 2: pf. 112, f. 6-10. 
Tribe 8. ALCHEMILLEAE. Perennial or annual herbs, with alternate 
leaves. Stipules ‘of the stem-leaves are usually large, connate around the 
stem and more or less adnate to the petioles or the leaf-blades ; in some spe- 
cies of Lachemilia, all the stipules are connate-perfoliate and together with 
the reduced leaf-blades form a subconic, many-cleft sheath around the stem. 
Inflorescence cymose, with the flowers often congregated in small clusters. 
Hypanthium campanulate or urceolate, in fruit enclosing the achenes. Disk 
more or less developed, bearing the stamens on theinner or outer side. Sepals 
4or5. Bractlets of the same number or sometimes lacking. Petals wanting. 
Anthers opening by a transverse slit. Pistils 1-8; styles nearly basal, per- 
sistent ; stigmas capitate. 
Stamens inserted on the outside of the disk, introrse. 
Stamens 4, alternate with the sepals; disk strongly developed ; perennials 
with strong rootstocks, 30. ALCHEMILLA, 
Stamens 1, seldom 2-5, opposite one or more of the sepals or by shifting 
nearly alternate with them ; disk poorly developed ; plants annual. 31. APHANES. 
Stamens 2, inserted on the inside of the disk, extrorse, opposite two of the 
sepals; disk usually well developed; plants with perennial roots, some- 
times with woody candices. 
Leaves palmately lobed or divided ; sepals and bractlets 1-nerved. 32. LACHEMILLA. 
Leaves, at least the basal ones, pinnately divided ; sepals and bractlets 3- 
nerved, 33. ZYGALCHEMILLA. 
30. ALCHEMILLA L. Sp. Pl. 123. 1753. 
Perennial herbs, with strongly developed rootstocks. Basal leaves petioled, with scarious, 
brown or wine-colored stipules; leaf-blades digitately lobed or divided; stem-leaves with 
connate and adnate stipules and short-petioled or sessile blades, the uppermost much 
reduced. Inflorescence cymose, but often very irregular and the yellowish or greenish 
flowers conglomerate in small terminal clusters. Hypanthium campanulate or obconic, 
only slightly contracted at the mouth; disk thick and almost closing the mouth of the 
hypanthium. Sepals usually 4, subtended by 4 bractlets. Petals wanting. Stamens 4, in- 
serted outside the disk, between the sepals; filaments short; anthers introrse, opening by 
a transverse slit. Pistils usually solitary; styles basal; stigmas capitate. Achenes ovate. 
Type species, Alchemilla vulgaris ,. 
Leaf-blades green, merely lobed. 
Hypanthium glabrous. . . ; 
Pubescence of the stem and the petioles dense and spreading ; inflores- . 
cence open ; leaf-blades glabrous above. 1. A. pratensis. 
Pubescence of the stem and the petioles scant and mostly appressed ; 
inflorescence congested. 
Leaf-blades pubescent on both sides ; stem-leaves with shallow lobes. 2. 4. glomerulans 
Leaf-blades glabrous or nearly so above; stem-leaves with deep lobes. 3. A. Wichurae. 
Hypanthium pubescent. 4, A. filicaulis. 
Leaf-blades silvery beneath, divided to near the base. 5. A. alpina. 
