August 21, 2019

KeyBase

KeyBase: (from the homepage) is a database and web application for managing and deploying interactive pathway keys to plants, animals and other groups of organisms:
https://keybase.rbg.vic.gov.au/

Posted on August 21, 2019 19:11 by blue_celery blue_celery | 0 comments | Leave a comment

August 06, 2019

July 12, 2019

Plantagineae of the World

Posted on July 12, 2019 14:05 by blue_celery blue_celery | 0 comments | Leave a comment

June 05, 2019

La végétation del'Afrique - Mémoire accompagnant la carte de végétation del'Afrique (1986)

La végétation del'Afrique - Mémoire accompagnant la carte de végétation del'Afrique (1986)

http://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers11-06/24837.pdf

Posted on June 05, 2019 10:25 by blue_celery blue_celery | 0 comments | Leave a comment

May 30, 2019

Carpobrotus (affinis) acinaciformis vs edulis subsp. edulis

1) Staminodes (petals) pink. Hypanthium abruptly narrowed into peduncle. Receptacle flat. Upper leaves distinctly saber-shaped: C. (affinis) acinaciformis

1A) Staminode (petals) pale yellow (rarely yellow), sometimes pale pink when senescing. Hypanthium gradually narrowed. Receptacle raised. All leaves not saber-shaped: C. edulis subsp. edulis

Posted on May 30, 2019 16:20 by blue_celery blue_celery | 2 observations | 0 comments | Leave a comment

May 13, 2019

Species Plantarum Programme

Posted on May 13, 2019 13:50 by blue_celery blue_celery | 0 comments | Leave a comment

April 17, 2019

Phelipanche nana vs ramosa vs mutelii

Phelipanche nana from P. ramosa and P. mutelii is surely osften challenging and they have been sometimes misidentified.
In particular, many observations of P. ramosa from North America seem to be more fitting with P. nana.

This is a key that could turn out to be useful for the users:

1) Corolla upper outline not or only slightly gibbous (lower and upper outlines nearly parallel towards corolla gorge). Flowers erecto-patent: P. mutelii.

1a) Corolla upper outline distinctly gibbous. Flowers erecto-patent or spreading: 2.

2) Calyx teeth as long as or shorter than calyx tube, narrowly triangular. Flowers erecto-patent. Stem often branched. Corolla light blue to whitish. Parasitizing cultivated plants: P. ramosa.

2a) Calyx teeth longer than calyx tube, subulate. Flowers spreading. Stem rarely branched. Corolla blue, rarely light blue or whitish. Parasitizing wild plants: P. nana.

N.B. in order to observe the "calyx teeth" character, it would be useful to detach the flower from the inflorescence, to remove the bract and to photograph the calyx with a macro lens or under a stereomicroscope.

Sources:
- Holoparasitic Orobanchaceae (Cistanche, Diphelypaea, Orobanche, Phelipanche) in Armenia: distribution, habitats, host range and taxonomic problems.
https://biotaxa.org/Phytotaxa/article/view/phytotaxa.386.1.1

- Más, a propósito de algunas Phelipanche Pomel, Boulardia F. W. Schultz y Orobanche L. (Orobanchaceae) del oeste del Paleártico. Documentos Jard Bot Atlántico (Gijón) 6: 1-128
https://www.researchgate.net/publication/268809711_Mas_a_proposito_de_algunas_Phelipanche_Pomel_Boulardia_F_W_Schultz_y_Orobanche_L_Orobanchaceae_del_oeste_del_Paleartico_Documentos_Jard_Bot_Atlantico_Gijon_61-128

- Phelipanche mutelii in Index of Orobanchaceae
http://www.farmalierganes.com/Flora/Angiospermae/Orobanchaceae/Phelipanche/Phelipanche_mutelii/Phelipanche_mutelii.htm

- Phelipanche nana in Index of Orobanchaceae
http://www.farmalierganes.com/Flora/Angiospermae/Orobanchaceae/Phelipanche/Phelipanche_nana/Phelipanche_nana.htm

- Phelipanche ramosa in Index of Orobanchaceae
http://www.farmalierganes.com/Flora/Angiospermae/Orobanchaceae/Phelipanche/Phelipanche_ramosa/Phelipanche_ramosa.htm

Posted on April 17, 2019 19:52 by blue_celery blue_celery | 5 comments | Leave a comment

April 11, 2019

Iridaceae presenti in Italia Iridaceae Present in Italy

Iridaceae presenti in Italia Iridaceae Present in Italy:
www.editricesapienza.it/sites/default/files/4679_Colasante_Iridaceae.pdf

Posted on April 11, 2019 21:10 by blue_celery blue_celery | 0 comments | Leave a comment

April 10, 2019

Willows of Russia and Adjacent Countries.

Willows of Russia and Adjacent Countries. Skvortsov 1999
http://172.104.19.75/announcements/skv/skvortsov.pdf

Posted on April 10, 2019 19:38 by blue_celery blue_celery | 0 comments | Leave a comment

January 30, 2019

European broomrapes: how to ask for an identification

Often broomrapes are really challenging as far as their identification is concerned because many related taxa share high similarities as well as they are often highly variable.
This is a brief guide that could allow an easier identification.

1) Species growing in their proximity. Broomrapes are obligate parasite that feed on other plants and it is known that certain species of broomrapes feed only on certain hosts. Thus, it is important to know which are the species that grow in their proximity since they could be the host.

2) Habit: it is important to observe the whole plant because the inflorescence:stem ratio may be diagnostic. Some species often show branched stem. Some species usually grow as dense clusters, some others are more aften found as single stems.

3) Stem: it can be either stout or thinner.

4) Leaves: they are scale-like and their shape and density can be sometimes useful for the identification.

5.1) Inflorescence shape: it can be either dense or with sparse flowers. Inflorescence apex can be either pointed or more or less rounded and sometimes, due to the presence of lonf bracts, it has a comose appearance.

5.2) Orientation of flowers: it can be either spreading or erecto-patent ot more or less directed upwards.

6.1) Bracts: they can be either longer or shorter than corolla as well as either lanceolate or narrower and more or less linear. In Boulardia latisquama they are particularly large.

6.2) Bracteoles: the genus Phelipanche is characterized by the presence of a pair of narrow bracteoles which are lacking in Orobanche sensu stricto and Boulardia.

7) Calyx: it is often divided up to the base but in few cases it is entire at base and more or less tubular. It has one or to (exceptionally more) laciniae at each side. The ratio corolla:calyx is often diagnostic. Also the shape of the calyx laciniae is often important since they can be either narrowly triangular or even narrower and subulate.

8) Corolla. Diagnostic features:
- length (to be measured with millimeter paper)
- upper outline (more or less straight or curved) to be observed from the side
- enlarged at base, with a constriction in the middle, enlarged at apex, narrower close to the apex to be observed from top view
- base: straight, geniculate (bent in lower third) or gradually curved
- outline of the apex: with pointing forward lobes or campanulate to be observed from the side and from top view
- upper lip: pointing forward or upward; entire or emarginate, with entire margin or dentate
- lower lip: pointing forward or downward; with entire margin or dentate, with central lobes larger than the lateral ones or more or less all alike

9) Stigma: sometimes stigma color may be helpful as well as if it is well exerted from corolla gorge

10) Stamens. Diagnostic feature such as the point of attachment at corolla is to be measure from corolla base

11) Hairiness: the kind of hairiness must be observed with attentionj of every part of the plant (e. g. Orobanche pubescens is rather easily distinguished from the related species for the presence of very long hairs on corolla upper side)

12) Color: also the color of varius parts of the plant must be observed even though broomrapes often show high variability. Anyway, there are species that are never, for example, yellow or other species that always have a blue corolla.

NB: broomrapes that have dried out are extremely difficult to be identified

Posted on January 30, 2019 22:36 by blue_celery blue_celery | 5 comments | Leave a comment