Peucedanum officinale L. subsp. album Martinez-Fort & Donat-Torres, 2019

Martinez-Fort, Javier, Leon, Maela & Donat-Torres, Maria P., 2019, A new subspecies of Peucedanum officinale L. subsp. album (Apiaceae) from the eastern part of the Iberian Peninsula, PhytoKeys 131, pp. 37-55 : 45-47

publication ID

https://dx.doi.org/10.3897/phytokeys.131.32173

persistent identifier

https://treatment.plazi.org/id/007C4688-83D8-5349-8940-A467673F00D6

treatment provided by

PhytoKeys by Pensoft

scientific name

Peucedanum officinale L. subsp. album Martinez-Fort & Donat-Torres
status

subsp. nov.

Peucedanum officinale L. subsp. album Martinez-Fort & Donat-Torres View in CoL subsp. nov.

Diagnosis.

Peucedanum officinale L. subsp. album can be morphologically distinguished by the canaliculated leaflets, inflorescences without dominant terminal umbels, which are often sessile and lateral, with few rays (3) 5-9 (12), umbellules with (7) 10-16 (18) raylets, white-petalled flowers and fruits with a fructiferous raylet as long as or shorter than the length of the fruits.

Type.

Valencia, Tavernes de la Valldigna, eastern spurs of the Serra de les Agulles mountain range, on both ascents to Pic Massalari. 39,09°N, - 0,284°W. 300 m alt. Rocky calcareous soil. 23-IX-2012. J. Martínez-Fort (Holotype: VAL 223161! Figure 2 View Figure 2 ).

Description.

Perennial plant with stem (0.24) 0.41-0.98 (1.3) m high and 2.1-4.6 (6.3) mm in diameter at the base, branching from the lower 1/3-1/2, striate, glabrous. Basal leaves 4- or 5- (6-) ternate, triangular in outline, (190) 257-538 (630) mm in length; petioles cylindrical, (42)53-171(250) mm long, sheathing at the base; linear terminal leaflets, (31.3) 47.9-83.7 (94.4) mm × 0.3 to 0.6 (0.7) mm, canaliculate, length/width ratio of (50) 70-126 (166) range, angle between the closest divisions of the terminals (30) 32-66 (90) degrees and (45) 111-180 degrees between the outermost leaf divisions. Cauline leaves, decreasing in size towards the apex of stems, but with enlarged sheaths. The first leaf on stem from the basal rosette leaf 3-4 (5) times ternate, with terminal divisions of (1.8) 6.5-36.4 (40.8) mm of length and canaliculated. The uppermost ones reduced to the sheath.

Inflorescence without a primary or dominant umbel, umbels arranged along the axis of inflorescence, sometimes sessile and lateral. Umbels compound, rays (3) 5 to 9 (12), inner rays shorter (2.8) 4- 24.3 (42.6) mm, outer rays (15.7) 17.7-52.6 (83.7) mm, bracts 0 or 1 (2), linear-triangular, (0.6) 0.7 × 1.1 (1.3) mm. Umbellules with (7) 10 to 16 (18) raylets, bracteoles (4) 6 to 9, linear, gradually widened towards base. Flowers hermaphroditic, sepals 5 triangular, inconspicuous; petals 5, white, inflexed tips; stamens 5, alternate; stylopodium conical, similar in length to the styles; styles parallel at anthesis, becoming divergent in fruiting. Fruits dorsally compressed, elliptical, size (5.1)5.8-6.9 (7.1) × (2.6) 3.3-4.7 (5) mm, apex slightly off emarginated; mericarps homomorphic; median and lateral prominent ribs, apex slightly off emarginated; marginal ribs prominently winged, wings (0.2) 0.4-1 (1.1) mm, wide; commissural vittae 2; vallecular vittae 4; commissure very broad, from wing tip to wing tip. Raylets (1.8) 2.8-5.3 (6.1) mm long. The raylets length/fruit length ratio ranging from (0.3) 0.5-0.8 (1).

Distribution and habitat.

It is dispersed in the thermomediterranean sub-humid bioclima ( Rivas-Martínez 2004) on rocky soils of limestone and sandstone at the base and crest of cliffs and rocky slopes. Contacting with wet fringes of Rubio longifoliae-Quercetum rotundifolie Costa, Peris and Figuerola ( Costa et al. 1983), together with ash and arbutus. With abundant populations on the coastal and southern foothills of the Iberian system (Serra de les Agulles) and on the northern coastal foothills of the external Prebaetic system (Serra Grossa) ( Figure 3 View Figure 3 ).

Phenology.

Flowering July to October.

Paratypes.

SPAIN. Valencia: Alzira. Serra de la Murta, 30SYJ2934; on rocky outcrops, 25-IX-2011; J. Martínez-Fort (VAL 223162!, Figure 1B View Figure 1 ; Valencia: Corbera de Alzira, 30SYJ23; J. Borja (VAL 154996!; Figure 1 C–D View Figure 1 ); Valencia: Favara, Serra de Corbera, 30SYJ33, 5-IX-1986; G. Mateo & al. (VAL 117826!).

Key to the subspecies of Peucedanum officinale

Kingdom

Plantae

Phylum

Tracheophyta

Class

Magnoliopsida

Order

Apiales

Family

Apiaceae

Genus

Peucedanum