“ WOOTON AND STANDLEY—FLORA OF NEW MEXICO. 505 
2. APOCYNUM L. DoasBane. 
Perennial herbs with reddish or greenish stems, 1.5 meters high or less, with tough 
fibrous bark and opposite nucronate entire leaves; flowers small, pinkish or greenish 
white, in terminal cymes; calyx small, deeply 5-parted, adnate to the ovary by a 
thickish disk; corolla short-campanulate or urceolate, the limb erect or spreading, 
5-lobed, bearing appendages within alternate with the 5 included stamens; filaments 
short, the anthers sagittate; fruit a pair of follicles, terete or long-fusiform; seeds 
numerous, with a coma at the apex. 
KEY TO THE SPECIES. 
Corolla 5 mm. long or more, its lobes spreading; leaves ovate; 
low plants with spreading branches and bright pink 
flowers. 
Leaves glabrous beneath; sepals narrowly lanceolate. .. -.. 1. A. ambigens. 
Leaves pubescent beneath; sepals narrowly or broadly lan- 
ceolate. 
Sepals broadly lanceolate; corolla open-campanulate; 
leaves thick, dark green, decidedly pubescent 
beneath........-..------- 2-2-2 eee eee ee eee eee 2. A. scopulorum. 
Sepals narrowly lanceolate; corolla narrowly campanu- 
late; leaves pale green, pubescent only on the 
petioles and veins............-.--------------- 3. A. lividum. 
Corolla 3 mm. long or less, with erect lobes; leaves oblong to 
narrowly elliptic-oblong; tall plants with erect or strongly 
ascending branches and pale flowers. 
Leaves pubescent beneath..............-.+-+-0-202------- 4. A. laurinum. 
Leaves glabrous. 
Cauline leaves broadly oblong, clasping, obtuse.......- 5. A. hypericifolium. 
Cauline leaves narrower, petioled, acute, bright green. 
Leaves rounded or obtuse at the base, oblong to 
elliptic-oblong.............-------+++--+----- 6. A. viride. 
Leaves acute at the base (on longer petioles), ellip- 
tic-lanceolate........------+------- ..... 7. A. angustifolium. 
1. Apocynum ambigens Greene, Pl. Baker. 3: 17. 1901. 
Type Locauity: ‘‘In the Black Cafion,’”’ Colorado. 
RanGeE: Washington and Montana to California and New Mexico. 
New Mexico: Raton; White Mountains. Mountains, in the Transition Zone. 
2. Apocynum scopulorum Greene; Rydb. Colo. Agr. Exp. Sta. Bull. 100: 269. 
1906. 
Type Locauity: Colorado. 
Rance: British America to Colorado and New Mexico. 
New Mexico: Chama; Santa Fe and Las Vegas mountains; Sierra Grande; Sandia 
Mountains; Lookout Mines; Turkey Creek; White and Sacramento mountains. Open 
slopes in the mountains, in the Transition Zone. 
3. Apocynum lividum Greene, Pl. Baker. 3: 17. 1901. 
Apocynum cannabinum lividum A. Nels. in Coulter, New Man. Rocky Mount. 386. 
1909. 
Type LocALIty: ‘‘Common on railway embankments in Black Cafion,”’ Colorado. 
RanGE: Mountains of Colorado and northern New Mexico. 
New Mexico: Sierra Grande (Standley 6195). Transition Zone. 
Professor Nelson’s reduction of this species to rank as a subspecies of A. canna- 
binum is peculiarly unfortunate, since the two plants are not closely related. 
