Scutellospora Dipurpurescens, A New Species in the Endogonaceae from West Virginia

ABSTRACT

Scutellospora dipurpurescens, sp. nov. (Endogonaceae) was discovered in several unmanaged pastures and a partially reclaimed surface coal mine in West Virginia. Spores are yellow to greenish-yellow with four walls. An outer finely laminate wall and a second hyaline membranous wall form the outer wall group. The inner wall group consists of a semi-rigid hyaline unit wall and an innermost hyaline amorphous wall. Both inner walls stain in Melzer's solution, a diagnostic feature of this species. The inner unit wall stains light pinkish-purple and the inner amorphous wall stains reddish to dark purple. This fungus forms mycorrhizae with arbuscules but not vesicles in fescue, sudangrass, and red clover grown in pot culture.

Key Words:

• vesicular-arbuscular mycorrhizae
• taxonomy
• Scutellospora