Syagrus romanzoffiana x glaucescens

From Palmpedia - Palm Grower's Guide
Jump to: navigation, search

Syagrus x serroana

Syagrus (see-AHG-ruhs)
romanzoffiana x glaucescens
(roh-man-zoff-ee-AH-nah)
x (glaw-SES-sens)
Syagrus serroana4.JPG
Image-Dr. KELEN PUREZA SOARES, Universidade Federal de Santa Maria.
Scientific Classification
Genus: Syagrus (see-AHG-ruhs)
Species:
romanzoffiana x glaucescens
(roh-man-zoff-ee-AH-nah)
x (glaw-SES-sens)
Synonyms
Syagrus x serroana
Native Continent
America
America.gif
Morphology
Habit: Solitary
Leaf type: Pinnate
Culture
Survivability index
Common names
None.

Habitat and Distribution

Natural hybrids between S. glaucescens and S. romanzoffiana seem to be infrequent,
Image-Dr. KELEN PUREZA SOARES, Universidade Federal de Santa Maria.
only two individuals were found, of the type locality and another on the road from Diamantina to Milho Verde (18º17’23.93”S 43º33’9.00”W).

Description

Solitary palm, size moderate, 4–7 m tall (Fig. 5A). Stem 17–22 cm diam., covered with leaf base remains in the younger part, vertically spiraling rows (Fig. 5B), when the sheaths fall, the scars that remain on the stem less marked than in S. glaucescens (Fig. 5D & 5E). Leaves 9–12, possibly more, little arched, 2.5–3 m long, dark green, bright, (Fig. 5C); sheath 47–53 cm, deeply split opposite petiole, margins with hair-like fibers; pseudopetiole 30 cm long; petiole 7–8 × 2.2–2.5 cm, convex abaxially and slightly channeled adaxially, with dense brownish, mealy, ± deciduous tomentum; rachis 220–250 cm long, convex, abundantly tomentose, ± flat adaxially near the base progressively becoming an angled, sharp costa distally; leaflets 115–120 per side, rigid, irregularly arranged, inserted in 3 or 4 planes, clustered 3–4 leaflets, proximal leaflets to 50–55 × 1.7–1.8 cm, mid-blade leaflets 55–65 × 2.8–3 cm, most distal leaflets 19–25 × 1.1–2 cm, long-lanceolate, straight, thin-leathery, dark green, abaxially the midrib with scarce ramenta. Inflorescences androgynous, interfoliar, 80–100 cm long, pendulous, 1–branched; prophyll 59 × 6 cm; peduncular bract woody, sulcate, green, total length 120–130 cm, expanded portion 76–81 × 11.5–15 cm, bearing a 3 cm beak; peduncle 45–500 × 2.0–2.3 cm, densely covered with tomentum (Fig. 5F); rachis 45–55 cm long; rachillae 60–70, proximal 39–55 cm long, midrachis 35–50 cm long, most distal 20–30 cm long, arranged in spiral. Flowers, cream or yellow, arranged spirally in triads (1 pistillate and 2 staminate) on the lower portion and in dyads or singly (only staminate) on upper portion of the rachillae; staminate, 9–10 mm long, cupular, sepals and petals 3, sepals connate, less than 1 mm long, glabrous, petals valvate, 8–9 × 3 mm with acute tips, glabrous, stamens 6, ca. 4–5 mm long, anther 3–4 mm long, filaments 1–2 mm long pistillode 1.0–1.5 mm and trifid; pistillate flower 10–12 × 5–6 mm, ovoid; sepals and petals 3; sepals 10–12 × 6–10 mm, petals imbricate, 8–10 × 6–9 mm, pistil 10–11 mm, ovoid, stigmas 3 (Fig. 5G). Fruits 4.2–4.5 × 2.5–3.2 cm, ovoid, maturing yellowish green; endocarp fusiform, 2.8–3.5 × 1–1.3 cm, homogeneous endosperm. ETYMOLOGY: The epithet serroana refers to the Serro municipality in Minas Gerais (Brazil), the first locality where this hybrid was found.

NOTE: This hybrid has intermediate characteristics between the species S. glaucescens (Fig. 7) and S. romanzoffiana (Fig. 6B) mainly in the consistency of the leaflets, in the surface of the stem and overall size (size of the leaves, inflorescence rachis and stem), it is easily recognized among pure specimens (Table 4). Editing by edric.

Culture

Flowering and fruiting during spring to fall. Seeds germinate moderately easy. Can take light frost without problem. Cold Hardiness Zone: 10a

Comments and Curiosities

"This hibrid was described by me and Lucas Assis last year on PALMS journal. The first one was found in Serro-Minas Gerais, however it was more commun in Diamantina-Minas Gerais (Serra do Espinhaço), where we can found until now about 7 adult plants and other plants like that of Alberto. Best regards!" (Dr. KELEN PUREZA SOARES).

Hybrid between Syagrus glaucescens and Syagrus romanzoffiana with intermediate morphological characteristcs mainly in the consistency of the leaflets, in the surface of the stem and overall size of the leaves, inflorescence rachis and stem. Typus: BRAZIL. Minas Gerais: Serro, próximo ao Rio do Peixe, 8º38’16.73”S 43º24’33.82”W, fl., fr., 26 Apr. 2012, K. Soares.

"Syagrus serroana is the hybrid between Syagrus glaucescens and S. romanzoffiana. Four years ago I made this hybrid not knowing this was a natural hybrid recently described. I collected S. glaucescens pollen on my posttour of the 2010 IPS Rio Biennial. I deep freezed it and used the last little amount on one of my tableland S. romanzoffiana. Not a lot of seeds but still could produce 5 plants , that are now +- 5 years old." ( Alberto Leonardo Barkema)


External Links

References

Phonetic spelling of Latin names by edric.

Special thanks to Geoff Stein, (Palmbob) for his hundreds of photos.

Special thanks to Palmweb.org, Dr. John Dransfield, Dr. Bill Baker & team, for their volumes of information and photos.

Glossary of Palm Terms; Based on the glossary in Dransfield, J., N.W. Uhl, C.B. Asmussen-Lange, W.J. Baker, M.M. Harley & C.E. Lewis. 2008. Genera Palmarum - Evolution and Classification of the Palms. Royal Botanic Gardens, Kew. All images copyright of the artists and photographers (see images for credits).

KELEN PUREZA SOARES, Universidade Federal de Santa Maria.


Many Special Thanks to Ed Vaile for his long hours of tireless editing and numerous contributions.

Banner1B
Back to Palm Encyclopedia


Retrieved from "https://palmpedia.net/wiki/index.php5?title=Syagrus_romanzoffiana_x_glaucescens&oldid=165090"