. Bursa bursa-pastoris and Bursa heegeri biotypes and hybrids. Bursa bursa-pastoris; Bursa heegeri; Plant hybridization. BIOTYPES AND HYBRIDS. 19 there is no incision on either margin of the lateral lobes and hence no rounded lobe corresponding with what I have called the "secondary lobe " in B. bp. heteris, though there may be a slight expansion of leaf-tissue in that reg-ion, especially in strongly developed specimens, which no doubt corresponds to the secondary lobe (fig. 9). All the lateral lobes tend to be more or less slender, elongrated, and acute. In the more robust speci- me
. Bursa bursa-pastoris and Bursa heegeri biotypes and hybrids. Bursa bursa-pastoris; Bursa heegeri; Plant hybridization. BIOTYPES AND HYBRIDS. 19 there is no incision on either margin of the lateral lobes and hence no rounded lobe corresponding with what I have called the "secondary lobe " in B. bp. heteris, though there may be a slight expansion of leaf-tissue in that reg-ion, especially in strongly developed specimens, which no doubt corresponds to the secondary lobe (fig. 9). All the lateral lobes tend to be more or less slender, elongrated, and acute. In the more robust speci- mens there is apt to be some secondary lobation, but in all cases these secondary lobes are also attenuate. A secondary spur directed outward. Fig. S.—Bursa biirsa-pastoris heteris (?) grown from seed received from Tucson, Arizona. and proximad from near the base of the lateral lobes is often noted in well-developed plants belonging' to this biotype (fig. 10). In many in- stances the long, slender lobes are somewhat recurved at the tips, but in other cases all lobes are practically straight. Under this type may belong- Almquist's C. dp. pedemontana (his figf. 17), leontodon (fig\ 3l), dentata (fig. 35), lacerata (fig". 37), bergiana (fig-. 38), laxa (fig*. 39), querceti (fig-. 40), ramselensis (fig-. 41), and linearis (fig-. 58).. 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 Shull, George Harrison, 1874-1954. Washington, D. C. , Carnegie Institution of Washington
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