Figure 1. Astraeus Hygrometricus all opened up
Name: Astraeus hygrometricus
Family: Diplocystaceae
Collection Date: 10/15/2011
Habitat: Growing on the ground at the base of a tree.
Location: Cleveland Metroparks- South Chagrin Reservation
Description: “Outer walls splitting at maturity into 6-15 pointed rays; 1-5 (8) cm broad when fully expanded. Rays hygroscopic (unfolding in wet weather and closing up over the spore case in dry weather) … tough and leathery when moist, hard when dry… upper surface (interior) at first smooth, but often developing numerous cracks…Spore case 0.5-3 cm broad…sessile (without a stalk)…Spore mass brown to cocoa-brown and powdery when mature” (Arora, 1986).
Collector: Jennifer Friedler
Key Used: Arora. D., (1986) Mushrooms Demystified 2nd Edition, Ten Speeds Press, New York, NY
Keying Steps:
Major Groups of Fleshy Fungi… p.52
Puffballs & Earthstars… p.677
(Lycoperdales & Allies)
1a. Outer layer of fruiting body splitting into several starlike rays which unfold to expose the inner skin or spore case…p. 699, Geastrum, Astraeus, & Myriostoma
1a. Spore case typically rupturing through a single apical pore (mouth at top)…2
2a. Rays distinctly hygroscopic (i.e., folding over the spore case in dry weather to protect it and unfolding when moistened); spore case usually sessile (not seated on a short stalk)…3
3b. Fruiting body smaller [than 5-15cm] and/or rupturing through an apical pore or slit...4
4a. Apical pore often irregular or poorly defined or merely a slit… p. 705, Astraeus hygrometricus
Correlating Links:
http://eol.org/pages/1029271/media