In Plate D are represented four species of the genus Morchella, viz., M. _semilibera_, M. _bispora_, M. _conica_, and M. _deliciosa_. Morchella _esculenta_ is figured in Plate C. FIG. 1. =Morchella semilibera= De Candolle. "_Half Free Morel_." EDIBLE. Cap conical but half free from the stem as the name of the species indicates. The ribs are longitudinal, forming oblong pits; stem hollow, much longer than the cap, white; spores elliptical. Peck says that this species has been described by Persoon under the name Morchella _hybrida_, and this name is adopted in Saccardo's Sylloge Fungorum, but most English writers prefer the first. Fig. 2. Sectional view of Morchella _semilibera_. Fig. 8. Sporidia of same inclosed in ascus with accompanying paraphyses. FIG. 3. Sectional view of =Morchella bispora= Sorokin. "_Two-Spored Morel_." EDIBLE. Cap free from the stem to the top, somewhat resembling that of M. _semilibera_, but blunt at its summit instead of conical, the outward surface deeply pitted, inner surface smooth and barren. A characteristic of this species which distinguishes it from others of the same genus is found in the number of its sporidia, spores as seen in the ascus or spore sack. In the plants of the genus Morchella the spore sacks, with one or two exceptions, contain eight spores. In the species M. _bispora_ the spore sacks contain but two spores and these are much larger than the sporidia of those which contain eight. This characteristic, however, can only be determined by the aid of the microscope. Cooke figures a specimen taken from those published by Sorokin in Thumen's Exsiccata, and calls it a variety of Morchella _Bohemica_ Kromb. He says that it is not unusual to find M. _Bohemica_ with two or four sporidia in some of the asci, mixed with others containing more, some specimens being entirely tetrasporous, and some, as the variety _bispora_, usually containing but two sporidia. Cooke contends that M. bispora is simply a bisporous form of Morchella _Bohemica_, and calls it M. _Bohemica_ var. _bispora_. It is not as common as other species. Fig. 9 represents asci of M. bispora showing the two spores in each ascus. FIG. 4. =Morchella conica.= "_Conical Morel_." EDIBLE. Cap conical or oblong-conical, margin adhering to the stem, the prominent ridges longitudinal and irregularly bisected with shorter ones; the whole plant hollow throughout; color pale tan or ochraceous yellow, growing dingy and darker with age; stem white; spores elliptical. This species is quite plentiful in some localities; the flavor is like that of M. _esculenta_. Fig. 5. Sectional view of M. _conica_. Fig. 10. Ascus, sporidia and paraphyses. FIG. 6. =Morchella deliciosa= Fries. "_Delicious Morel_." Cap nearly cylindrical, blunt at the top, and usually much longer than the stem, adnate. Plant hollow throughout. Stem white. Spores elliptical. Fig. 7. Sectional view of M. _deliciosa_.