. Elementary botany. Botany. 2l6 MORPHOLOGY. In the autumn and winter dead llies are often found stuck to window-panes^ with a white rin^^ of thr eonidia around each lly. II, Class Ascomycetes. (The ascus series.) 1. SUBCLASS HEMIASCOMYCETES. 441. Order Hemiascales (Hemiascines").—Fungi with a wch developed, septate m)'celium, Init \\-\\\\ a si)orangiuni-hke ascus, , a large and indefmite number of spores in the ascus. Kx- a m ]) 1 e s : Protomvces macrosporus in stems of Umbelhfene, or P. poly- sp<")rus in Ambrosia tri- lida. These two are bv some in the I'sti- lagin
. Elementary botany. Botany. 2l6 MORPHOLOGY. In the autumn and winter dead llies are often found stuck to window-panes^ with a white rin^^ of thr eonidia around each lly. II, Class Ascomycetes. (The ascus series.) 1. SUBCLASS HEMIASCOMYCETES. 441. Order Hemiascales (Hemiascines").—Fungi with a wch developed, septate m)'celium, Init \\-\\\\ a si)orangiuni-hke ascus, , a large and indefmite number of spores in the ascus. Kx- a m ]) 1 e s : Protomvces macrosporus in stems of Umbelhfene, or P. poly- sp<")rus in Ambrosia tri- lida. These two are bv some in the I'sti- lagine;e. Dipod ascus albidus grows in the exuding sa]) of Bromeli- acea' in Brazil and the sap of the beecli in Sweden. The ascus is developed as the result of the fertilization of an aseogoniuni with an an- theridiuni (see fi^- -Si)- ascog ° ' ' 2. SUBCLASS PROTOASCOMYCETES. 442. The a sci are well defined and usually with a limited and diiinite nuniher of spores (usu- ally S, sonK'times i, 2, 4, i6, or more). Mvcelium often well developed and septate. Asei scat- tered on the myceUum, not asscniated in defuiite iaelds or groups. 443. Order Protoascales (Protoascineae).—The asri arc separate cells, or are siaUrred irrcL^ularlv in loose wefts of niyceliuiu. Ko fruil body. Cl'he \easl, Sac . lianiniM .'S, see |iara);raph ly^y; ami lertain UKclddikc fun^i, siinie of wliiili ale parasili' on mushrooms, as ICndomyces, are I'xaniples.). L)|;jscus albiilus. .4, thread with sexual organs, asritj^cniiini and antheridium; B, fertilized ascogoniutn (lLVclo|i!n)f ascus; C, ascus witli spores; D, conidia. (After Lagerheim.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Atkinson, George Francis, 1854-1918. New York : H. Holt
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