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Taiwania, 56(4): 301-304, 2011 

Puccinia reynoldsii sp. nov. on Clerodendrum (Lamiaceae) from Burma 

Maung Mya Thaung 

Natural History Museum of Los Angeles County, 900 Exposition Blvd, Los Angeles, CA 90007, USA. 

Postal address: 5482 Los Robles, La Verne, CA 91750-1643, USA 

Email: mmthaung@verizon.net 

(Manuscript received 7 April 2011; accepted 1 September 2011) 

ABSTRACT: Puccinia reynoldsii sp. nov. is a new species encountered during mycological exploration on Clerodendrum indicum 

Kuntze from central Burma in the Pyinmana and the Gyobingauk townships. In this report, P. reynoldsii is described, illustrated, 

and discussed, based on traditional taxonomic tools. 

KEY WORDS: Biotroph, obligate parasite, Pucciniales, systematics, Uredinales. 

INTRODUCTION 

This paper presents a new Puccinia species occurring 

in spots on leaves of a wild plant, Clerodendrum indicum 

Kuntze (= C. siphonanthus R. Br. = vernacular 

Nga.ran°.pa.tu), from central Burma in the Pyinmana and 

the Gyobingauk townships (Thaung, 2005). The novel 

rust fungus exhibits neither spines on the teliospore nor 

appendages arising from the spore pedicel unlike 

Prospodium erebia (Syd. & P. Syd.) Bagyan. & Ravinder 

reported on Clerodendrum commersonii, C. fragrans, C. 

inerme and C. minahassae from South Asia, Southeast 

Asia, East Asia and Papua New Guinea, and Prospodium 

tirumalense Bagyan., Ravinder & P. Ramesh as 

'tirumalensis' on C. inerme recorded from India. 

This new rust also differs in morphology and 

taxonomy from several other rust fungi globally 

associated with Clerodendrum host plants including 

Aecidium clerodendri Henn., A. clerodendricola Henn., 

A. clerodendri-fragrantis J.M. Yen, A. clerodendri- 

serrati J.Y. Zhuang, Caeoma clerodendri Racib., 

Cerotelium daedaloides Cummins, C. peregrinum (Syd., 

P. Syd. & E.J. Butler) Arthur, Coleosporium clerodendri 

Dietel, C. euphrasiae (Schumach.) G. Winter (= C. 

tussilaginis f. sp. rhinanthacearum), Endophyllum 

superficiale (P. Karst. & Roum.) F. Stevens & Mendiola, 

Hemileia scholzii Syd. (= Uredo scholzii Henn.), Uredo 

clerodendricola Henn. and U. clerodendrina 

Vienn.-Bourg (http: //nt. ars-grin. gov/ fungaldatabases/ 

fungushost/new_frameFungusHostReport.cfm). It is 

therefore described as a new Puccinia species. 

MATERIALS AND METHODS 

Field collections were made in the Pyinmana and the 

Gyobingauk townships. Specimens were deposited in 

Herb. LAM (=UC) and PDD. The material was first 

examined in situ through a binocular dissecting 

microscope for gross morphological characters. They 

were then cut while fresh with a razor blade for freehand 

sections, and the best sections selected, teased or 

squashed in water, or after rehydration in 3% potassium 

hydroxide, if dry, for a preliminary examination under a 

binocular Leitz Laborlux D research microscope. Final 

observations were made in lactophenol or chloral hydrate 

solution, warmed gently to expel trapped air and to speed 

up clearing action, for examination with transmitted light 

of micro-characters at 400-630X. Cotton blue stain was 

used for hyaline structures. The specimen was identified 

to the genus Puccina Pers. of the rust fungus family 

Pucciniaceae based on teliospores being smooth and 

pedicels simple and smooth (Saccardo, 1888). Its status as 

a new species is circumscribed here under taxonomy. 

TAXONOMIC TREATMENTS 

Puccinia reynoldsii Thaung sp. nov. 

MycoBank no.: MB 563436 

Figs. 1-4. 

Maculae amphiphyllae, inconstanter rotundatae, 

margines purpureo cinctae, circa 4-8 mm diam., 

solitariae vel confluentiae, superne marcescente, 

nigrescente, inferne deinde brunneae. Pycnia et aecia 

ignota. Uredinia haud visa. Telia hypophylla, medium 

macularum dilute brunnearum rotundarum disposita, 

dispersa vel laxe gregaria, erumpentia. Teliosporae vulgo 

50-65 × 20-25 µm, interdum usque 120 × 56 µm quom 

immaturae, bicellulae, plerumque ellipsoidae vel 

interdum breviter oblongae, ad septum modice 

constrictae, superne conico-acutae vel rotundatae, 

inferne attenuatae, membrana 3-4 µm crassa, levi, 

brunnea, non germinantes, pedicello vulgo persistenti, 

sporam aequante vel plerumque breviore, interdum 

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Taiwania Vol. 56, No. 4 

Fig. 1. Clerodendrum indicum Kuntze leaves with subglobose spots of rust. Bar = 1.5 cm. 

Fig. 2. Puccinia reynoldsii – Telium with young teliospores. Bar = 30 µm.

December, 2011 Thaung: A new Puccinia species in Burma 

Fig. 3. Puccinia reynoldsii – Young developing teliospores. 

Bar = 30 µm 

oblique affixo, attenuato, simplici, hyalino; mesosporae 

25-30 × 20-25 µm, unicellulae. 

Holotypus: BURMA, Pyinmana, on leaves of 

Clerodendrum indicum Kuntze (Lamiaceae), 13 Dec 

1977, leg. et det. Maung Mya Thaung (LAM (=UC) 

220424-III-holotypus, PDD 56247-III-isotypus); 

BURMA, Gyobingauk, on leaves of Clerodendrum sp. 

(Lamiaceae), 18 Dec 1977, leg. et det. Maung Mya 

Thaung (LAM (=UC) 220978-III-paratypus). 

Spots on both sides of leaf, subglobose, pinkish to 

purplish at margin, about 4-8 mm diam, separate or 

coalescing, fading to dark grey above, becoming brown 

below (Fig. 1). Pycnia and aecia unknown. Uredinia not 

seen. Telia hypophyllous, dispersed or loosely grouped, 

becoming erumpent. Teliospores generally 50-65 × 

20-25 µm, sometimes up to 120 × 56 µm when 

immature, 2-celled, mostly ellipsoid or occasionally 

short-oblong, moderately constricted at septum, 

conic-acute to round above, attenuate below, wall 3-4 

µm thick, smooth, brown, not germinating, pedicel 

commonly persistent, equal to spore in length or 

generally shorter, sometimes obliquely attached, 

attenuate, simple, hyaline; mesospores 25-30 × 20-25 

µm, 1-celled (Figs. 2-4). 

Etymology: Named after Dr Don R. Reynolds, 

Research Botanist, Herbarium, University of California, 

Berkeley, for his enthusiastic support for the study of 

fungi from Burma. 

DISCUSSION 

Puccinia reynoldsii sp. nov. produces mesospores 

Fig. 4. Puccinia reynoldsii – Teliospores and mesospores. 

Bar = 30 µm. 

just like Prospodium tirumalense, but differs from 

Prospodium erebia and P. tirumalense in having smooth 

teliospores and simple, smooth pedicels. Moreover, it 

utilizes an entirely distinct host plant species, 

Clerodendrum indicum, in Lamiaceae while 

Prospodium rusts are geographically restricted largely 

to the Americas and the Caribbeans on Bignoniaceae and 

Verbenaceae (Cummins and Hiratsuka, 2003). 

LITERATURE CITED 

Cummins, G. B. and Y. Hiratsuka. 2003. Illustrated Genera 

of Rust Fungi. 3rd ed. American Phytopathological Society 

Press, St. Paul, MN, USA. 225pp. 

Saccardo, P. A. 1888. Puccinia graminis Pers. Sylloge 

Fungorum. 7: 622. 

Thaung, M. M. 2005. Rusts, smuts and their allies in Burma. 

Australas Mycol. 24: 29–46. 

USDA, A. R. S. 2011. http://nt.ars-grin.gov/fungaldatabases/ 

fungushost/ fungushost.cfm, accessed on 4/06/11. 

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Taiwania Vol. 56, No. 4 

緬甸於大青屬(Clerodendrum)植物體上的新種銹菌 – Puccinia reynoldsii 

Maung Mya Thaung 

Natural History Museum of Los Angeles County, 900 Exposition Blvd, Los Angeles, CA 90007, USA. 

Postal address: 5482 Los Robles, La Verne, CA 91750-1643, USA. 

Email: mmthaung@verizon.net 

(收稿日期:2011 年 4 月 7 日;接受日期:2011 年 9 月 1 日) 

摘要:在一次真菌調查中,於中緬甸的 Pyinmana 及 the Gyobingauk 鎮,長管大青 

(Clerodendrum indicum Kuntze)這種植物上發現一新種銹菌 – Puccinia reynoldsii。本文提 

供該新種之描述、圖片並進行討論。 

關鍵詞:活體營養生物、絕對寄生菌、柄銹菌目、系統分類學、銹菌目。

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