Starch is rapidly hydrolyzed. No growth on cellulose. Source: Isolated from mud from the edge of a river. Habitat: Unknown. 27. Streptomyces griseoluteus Ume- zawa et al., 1951. (Umezawa, Hayano, Maeda, Ogata and Okami, Jour. Antibiotics (Japanese), 4, 1951, 34; also see Okami, Jour. Antibiotics (Japanese), 5, 1952, 478.) gri.se.o.lu'te.us. M.L. adj. griseus gray; luteus golden yellow; M.L. adj. griseoluteus grayish yellow. Aerial mycelium: Hyphae branch mono- podially and irregularly; conidia ellipsoidal to cylindrical, 1.0 to 1.2 by 1.8 to 2.2 mi- crons. Gelatin : No growth. Agar: Wrinkled, transparent growth. Aerial mj'celium thin, white, powdery. No soluble pigment or a j'ellowish brown pig- ment. Synthetic agar: Thin, colorless to cream- colored growth. Margin plumose, penetrat- ing into medium. Aerial mycelium powdery, grayish white to light drab. No soluble pig- ment or a yellowish brown pigment. Glucose agar: Wrinkled, cream-colored growth. Aerial mycelium thin, white. Red- dish brown pigment. Glucose broth: Cream-colored to brown surface ring. Aerial mycelium powdery, white. Soluble reddish brown pigment weakly produced. Milk: Cream-colored ring; white surface patches. Potato: Abundant, wrinkled, cream- colored growth. Aerial mycelium dusty white, thin; plug becoming slightly brown- ish. Starch is hydrolyzed. Nitrites produced from nitrates. Antagonistic properties: Produces griseo- lutein, a yellow antibiotic active against Gram-positive and Gram-negative bacteria. Source: Isolated from the soil of a potato field in Tokyo. Habitat: Soil. 28. Streptomyces bobiliae (Waksman and Curtis, 1916) Waksman and Henrici, 1948. (Actinomyces bobili Waksman and Cur- tis, Soil Sci., /, 1916, 121; Waksman and Henrici, in Manual, 6th ed., 1948, 937.) bo.bi'li.ae. M.L. gen. noun bobiliae of Bobili; named for Bobili, a person's nick- name. Aerial mycelium: Few close spirals of a de.xtrorse type. Gelatin: Dense, cream-colored to brown- ish surface growth. Rapid liquefaction. Agar: Restricted, glossy, gray growth be- coming brownish. Synthetic agar: Abundant, glossy wrin- kled, elevated, coral-red growth becoming deep red. Aerial mycelium scant, white. Starch agar: Restricted, finely wrinkled, coral-red growth with hyaline margin. Glucose broth: Round colonies in fluid; flaky sediment. Milk: Dark brown ring; not coagulated; peptonized. Potato: Thin, yellowish growth becoming red, dry and wrinkled. Starch is hydrolyzed. Nitrites produced from nitrates. Soluble brown pigment formed. Aerobic. Optimum temperature, 37° C. Antagonistic properties: Positive. Source: Isolated once from adobe and from garden soils. Habitat: Soil. 29. Streptomyces aiirantiacus (Rossi- Doria, 1891, emend. Krassilnikov, 1941) Waksman, 1953. (Streptotrix (sic) aurantiaca Rossi-Doria, Ann. Inst. d'Ig. sper. d. Univ. di Roma, 1, 1891, 417; Actinomyces aurantia- cus Gasperini, Ann. Inst. d'Ig. sper. d. Univ. di Roma, 2, 1892, 222; Krassilnikov, Guide to the Actinomycetes, Izd. Akad. Nauk, U.S.S.R., Moskau, 1941, 36; Waksman, in Waksman and Lechevalier, Actinomj'^cetes and Their Antibiotics, Baltimore, 1953, 53.) au.ran.ti'a.cus. L. neut.n. aurum gold; M.L. neut.n. Aurantium generic name of the orange; M.L. adj. mirantiacus orange- colored. Vegetative growth: Lichenoid, dry, com- pact, bright orange or golden color which does not change on continued incubation. Pigment insoluble in medium but soluble in organic solvents. Produces an abundance of chlamydospores. Aerial mycelium: Poorly developed or completely absent on many media; non- septate. Sporophores form spirals with 3 to
