Puccinia nocticolor Holway (1904: 391)

De Carvalho-Junior, Anibal A. & Hennen, Joe F., 2018, Puccinia on Ipomoea (Convolvulaceae) in Neotropics, Phytotaxa 344 (2), pp. 133-148 : 142-143

10. Puccinia nocticolor Holway (1904: 391) .

≡ Allodus nocticolor (Holw.) Orton (1916: 197) .

Type:― MEXICO. Cuernavaca, 1 Oct 1899, on Ipomoea intrapilosa Rose, E.W.D. Holway 3549 (Holotype). Figure 3 G− H (Paratype).

Spermogonia and aecia unknown. Uredinia ( Aecidium type) chiefly hypophyllous, gregarious, on yellow spots, circular in outline or elongate on the veins, cylindric, 0.3–0.5 mm in diameter; peridium colorless, up to 2 mm long, becoming lacerate and falling away at maturity, peridial cells crescent-shaped, 16–24 × 32–55 μm, the outer wall 3–5 μm thick, appearing nearly smooth, the inner wall 7–10 μm thick, deeply fimbriate-verrucose; aeciospores globoid, 19–24 × 24–31 μm; wall colorless, 2–3 μm thick, 5–8 μm thick above, very finely verrucose ( Arthur and Orton 1921). Telia chiefly epiphyllous, gregarious, arising opposite or from around and among the aecia, circular in outline, 0.2–0.5 mm in diameter, early naked, soon becoming confluent and forming large sori up to 3 mm across, pulvinate, conspicuously pulverulent, blackish, ruptured epidermis not conspicuous; teliospores terete or fusiform, 26–35 × 50– 75 μm, narrowed or constricted above, usually rounded below; wall dark chocolate-brown, 4–5 μm thick, prolonged into a beak above, 12–19 μm thick, slightly paler at tip, coarsely and sparely tuberculate; pedicel slightly tinted close to spore, swelling below to twice its normal diameter, about twice the length of spore ( Arthur & Orton 1921). Life cycle (?/?, IIcv, III).

Specimen examined (Paratype)―on Ipomoea intrapilosa Rose from MEXICO. Mexico: Tehuacan, 7 Nov 1903, E.W.D. Holway 5345 (PUR57494!-II, III).

Distribution ―the specie occurs in Mexico, Guatemala, El Salvador ( Hennen & Cummins 1973).

Notes ―We had access only to a paratype collected in Tehuacan in 1903 and identified by Homer Doliver House in 1915 as I. intrapilosa Rose (in the protologue of P. nocticolor , published in 1904, the host was listed only as Ipomoea ). The uredinia from the paratype are very similar with the original description and with Arthur & Orton (1921 - Allodus nocticolor ) but the size of peridium and teliospores differs to some extent: While in Holway (1904), the teliospores are 60−80 × 28−40 μm and in Arthur & Orton (1921) are 50−75 × 26−35 μm, we found that they are 73−90 × 32−45 μm. The peridium of paratype is slightly lower than those of the two above papers. On the other hand, other characteristics are very similar. Soon after the preparation of the slides, some teliospores appeared collapsed, but after one or two hours the mounting medium was absorbed and all mature spores returned to the original appearances (turgid).

Figures

FIGURE 3. A−C. Puccinia jalapensis (Holotype). A−B. Urediniospores. A. Median focus. B. Surface focus. C. Line drawing of Teliospores.D−F.P. megalospora (Holotype). D−E. Urediniospores. D. Median focus. E. Surface focus.F.Teliospores.G−H. P. nocticolor (Paratype). G. Urediniospores in median focus above and in surface focus below. H. Teliospores in median focus above and in surface focus below. Bars:A−C, G=10 μm; D−F, H=20 μm.