178 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM, 
1. RAZOUMOFSKYA Hoffm. 
Small stout branched plants, with little or no greenish tinge, brownish or yellowish, 
parasitic on the Pinaceae; branches 4-angled, glabrous; leaves scalelike; fruit a com- 
pressed berry containing a single seed, maturing the second year. 
In general appearance the plants resemble Phoradendron juniperinum, but they 
are usually much smaller. They are of little value for decorations because of their 
lack of foliaceous leaves, but the berries of some species are handsome. 
KEY TO THE SPECIES. 
Stems stout, 2 to5 mm. in diameter; plants large, 6 to 20 cm. high. 
On Pinus brachypterd..........00-0 0 cece cee eee eee eee eee 1. R. cryptopoda. 
Stems slender, 1 to 2 mm. in diameter; plants. usually much 
smaller, 6 cm. high or less. 
Plants greenish brown; accessory branches of fruiting speci- 
mens mostly leaf-bearing. On Pinus edulis........... 2. R. divaricata. 
Plants greenish yellow; accessory branches of fruiting speci- 
mens flower-bearing. 
Fruit nearly truncate at the apex, obovoid, not manifestly 
stipitate. On Pinus flevilis....-...-2.-22.-.2..... 3. R. cyanocarpa. 
Fruit rounded or acutish at the apex, ellipsoid, evidently 
stipitate. 
Plants very slender, small, 3 cm. high or less. On 
Pseudotsuga.......---.---. 22sec eee eee eee eee 4. R. douglasii. 
Plants stouter, larger, 4 to6 cm. high. On Picea en- 
GElMANNt.... 2. cece cece ecces cece eee ee eee eeeeees 5. R. microcarpa. 
1. Razoumofskya cryptopoda (Engelm.) Coville, Contr. U. 8. Nat. Herb. 4: 192. 
1893. 
Arceuthobium robustum Engelm. Mem. Amer. Acad. n. ser. 4: 59. 1849, nomen 
nudum. 
Arceuthobium cryptopodum Engelm. Bost. Journ. Nat. Hist. 6: 214. 1850. 
Razoumofskya robusta Kuntze, Rev. Gen. Pl. 2: 587. 1891. 
TYPE Loca.ity: ‘‘Santa Fe, only on Pinus brachyptera.”” Type, Fendler’s no. 283. 
Range: Colorado to New Mexico and Arizona. 
New Mexico: Common on the yellow pine (Pinus brachyptera), wherever this is 
found. 
2. Razoumofskya divaricata (Engelm.) Coville, Contr. U. 8. Nat. Herb. 4: 192. 
1893. 
Arceuthobium divaricatum Engelm. in Wheeler, Rep. U. 8. Surv. 100th Merid. 6: 
254. 1878. 
Type Locauity: ‘‘On Nut-pines (P. edulis and monophylla) from southern Colorado 
through New Mexico to Arizona.” 
Rance: Colorado to Arizona and New Mexico. 
New Mexico: Tunitcha Mountains; Cedar Hill; Santa Fe; Mogollon Creek; Tele- 
graph Mountains; Fort Bayard; Burro Mountains. On Pinus edulis. 
3. Razoumofskya cyanocarpa A. Nels.; Rydb. Colo. Agr. Exp. Sta. Bull. 100: 
101. 1906. 
Arceuthobium cyanocarpum A. Nels, in Coulter, New Man. Rocky Mount. 146. 1909. 
Tyre Locauity: ‘‘Parasitic on Pinus flexilis, from Wyo. to Colo.”’ 
Rance: Wyoming to New Mexico. 
New Mexico: Hillsboro Peak; East Canyon. On Pinus flexilis. 
