Archivos de diario de julio 2020

09 de julio de 2020

Desiderata

before you post…

  • assess your comfort level
  • find comfort in discomfort (Stay engaged - the journey is worth the effort.)
  • be vulnerable
  • address strong emotions
while in discussion…
  • Reiterate.
    Restate to limit misunderstanding.

  • Contemplate.
    Move away from immediate emotional responses towards a deeper understanding of the topic opened up by the contributions of others.

  • Respire.
    Take a breath to settle thoughts and emotions during difficult conversations.

  • Communicate.
    Speak with compassion and thoughtfulness. Assume good intentions. Seek understanding. If challenge is appropriate (be careful!), challenge the statement rather than the person who said it.

rephrased from 'Let's Talk, Discussing Race, Racism and Other Difficult Topics with Students'. Teaching Tolerance, a project of the Southern Poverty Law Center.

Ingresado el 09 de julio de 2020 por marykrieger marykrieger | 0 comentarios | Deja un comentario

26 de julio de 2020

Rosa in Manitoba

Delimiting Species Boundaries in Rosa Sect. Cinnamomeae (Rosaceae) in Eastern North America
SIMON JOLY and ANNE BRUNEAU
Systematic Botany (2007), 32(4): pp. 819–836
https://www.webdepot.umontreal.ca/Usagers/jolysi/MonDepotPublic/jolylab/pdf/Joly&Bruneau_2007_SystBot.pdf

1.    Hypanthium glabrous........................................................................................... 2
      2.    Long and straight prickles present throughout the stems..................................... R. acicularis (MB)
      2.    Prickles absent from the stems or, if present, either short (bristles) or curved........................ 3
             3.    Infrastipular prickles stout and broad-based..........................................R. virginiana
             3.    Infrastipular prickles absent or not especially stout or broad-based............................. 4
                    4.    Generally fewer than 2 hairs per mm2 on the abaxial leaf surface;
                            infrastipular prickles always absent on new stems; 
                            bristles always present on new stems; 
                            leaflets from 7 to 9 per leaf..................R. arkansana (MB)
                    4.    Generally  more  than  2  hairs  per  mm2 on  the  abaxial  leaf  surface;  
                            infrastipular  prickles  either  present  or absent on new stems; 
                            bristles generally absent on new stems; 
                            leaflets from 5 to 7 per leaf....R. blanda (MB)  includes R. woodsii
1.    Hypanthium with glands   . .................................................................... 5
      5.    Bristles present on new branches............................................................ 6
             6.    Hairs present on the abaxial surface of the terminal leaflet...................................... 7
                     7.    Infrastipular prickles present...................................................R. carolina
                     7.    Infrastipular prickles absent    . .................................................R. arkansana (MB)
             6.    Hairs absent on the abaxial surface of the terminal leaflet.................................R. nitida
      5.    Bristles absent on new branches............................................................. 8
             8.    Width of the terminal leaflet less than 9 mm    . . ........................................R. foliolosa
             8.    Width of the terminal leaflet more than 9 mm    . .............................................. 9
                     9.    Hypanthium typically with more than 86 glands;
                           terminal leaflet oblong, 
                           generally with more than 20 small teeth per margin..........................................................R. palustris
                     9.    Hypanthium typically with fewer than 86 glands;
                           terminal leaflet ovate, elliptic or obovate, 
                           generally with fewer than 20 teeth per margin..................................................... 10
                            10.  Bristles  absent  on  new  stems;  
                                   auricles  more  than  3.8 mm  long;  
                                   stipules more  than  1.1 mm  wide;
                                   infrastipular prickles stout, broad based, and often curved......................R. virginiana
                           10.  Bristles present or absent on new stems; 
                                  auricles less than 3.8 mm long; 
                                  stipules less than 1.1 mm wide; 
                                  infrastipular prickles slender and not especially broad based or curved   ..............R. carolina

Glossary

Hypanthium = a cuplike or tubular enlargement of the receptacle of a flower, loosely surrounding the gynoecium or united with it (the thing that becomes the outside of the rose hip)

glabrous = smooth, hairless

glands = a plant structure which secretes one or more products. This may be located on or near the plant surface and secrete externally, or be internal to the plant and secrete into a canal or reservoir.

infrastipular - at the base of a node - on a stem the place where a bud occurs

auricle - small ear-like projection from the base of a leaf or petal.

abaxial - the underside

Ingresado el 26 de julio de 2020 por marykrieger marykrieger | 0 comentarios | Deja un comentario