Flowering

  • Jan1
  • Feb2
  • Mar3
  • Apr4
  • May5
  • Jun6
  • Jul7
  • Aug8
  • Sep9
  • Oct10
  • Nov11
  • Dec12
Not in Bloom

Distribution

חסה רותמית - מפת תפוצה

Geogr. District

Vegetation Units

Description & Remarks

My follow up of Lactuca saligna blooming was initiated by several photographs sent to me from two of the users of my website who also contributed many photographs of rare plants. When walking around in my neighborhood (Bet Hakerem, Jerusalem) I saw a single plant of Lactuca saligna with closed inflorescences. It was afternoon. On 22.10.2011 at 07:00 I photographed opened inflorescences (each yellow “petal” is in fact a ligulate floret and we see here a whole opened inflorescence and not an opened “flower”). On 24.10.2011 at 08:45 the inflorescences were fully opened and one hour later most inflorescences were closed. A researcher from the Volcani institute, investigating relationships between Lactuca serriola and the cultivated lettuce told me years ago that the efficient pollination was about 15 minutes around 07:00. I can conclude that a whole interesting world hides at the roadside. In another part of the walking path today I found blooming Lactuca serriola in the same time.
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Additional Names

Hebrew with Vowels:
חַסָּה רָתְמִית

תכונות וזיהוי

  • עלי הגבעול דמויי רומח או חץ בבסיסם, בעלי אוזניות מחודדות.

    עלי הגבעול דמויי רומח או חץ בבסיסם, בעלי אוזניות מחודדות.

  • מספר חפי-המעטפת של הקרקפות 11-9.

    מספר חפי-המעטפת של הקרקפות 11-9.

Life form (Raunkiaer):
annual
Spinescence:
absent
Succulence:
non-succulent
Summer Shedding:
ephemeral
Petal or tepal color:
Sexuality and Reproductive Morphology:
Flowers hermaphrodite only
Sporangia or Seed Homogeneity:
Homogeneous seeds-fruits
Flowering Time:
August, October, July, September
Leaf arrangement:
alternate (one leaf per node), rosette
Leaf Type:
dissected, pinnate
Leaf or leaflet margin:
dentate or serrate
Stipule:
absent

Taxonomy

Superdivision:
Spermatophyta
Division:
Angiospermae
Class:
Dicotyledoneae
Genus:
Lactuca