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Presentation on theme: "PLANT IDENTIFICATION."— Presentation transcript:



3 Catclaw Acacia Bipinnately compound leaves Brown, curved spines

4 Catclaw Acacia Fruit: bean-like Flower: yellow, elongated

5 Whitethorn Acacia Leaves: Bipinnately compound Spines: Straight, white
Bark: Reddish

6 Whitethorn Acacia Flower: yellow, spherical

7 Desert Ironwood Leaves: Simple pinnately compound Flowers: Purple
Spines: dark, thin, slightly curved

8 Desert Ironwood

9 Velvet Mesquite My knee for scale Leaves: Large, bipinnately compound
Relatively large leaflets and flowers

10 Velvet Mesquite Fruit: bean-like Flowers: yellow, long

11 Foothills Palo Verde Leaves: Bipinnately compound
4+ pairs of leaflets/“leaf” Spines: none along branches Bark: green

12 Foothills Palo Verde Fruit: bean-like
Flower: yellow, with white, upper banner petal

13 Blue Palo Verde Leaves: bipinnately compound
3 or fewer pairs of leaflets/“leaf” Spines along branches Bark: Green Spine Spine

14 Blue Palo Verde Flower: yellow, with yellow, upper banner petal

15 Shrubs

16 Fairy Duster Leaves: Bipinnately compound Fine, dark green leaflets
Spines: none Bark: whitish

17 Fairy Duster Flower: unique

18 Desert Mistletoe Parasitic Appear as clumps in trees most commonly
Phainopepla is main vector

19 Jojoba Leaves: simple, vertical Dioecious
Nuts appear on females in spring and summer

20 Jojoba Nuts produce high quality wax that is liquid at room temperature Instead of sperm whale oil

21 Brittlebush Leaves: simple, entire, triangle-shaped
Flowers: yellow (like lots of other plants

22 Brittlebush Yellow, like many other plants

23 Limberbush Leaves: simple, heart-shaped Bark: red Flexible limbs

24 Limberbush Flowers: small, white

25 Ocotillo Multiple arms Flowers: red, tubular Spines: straight, stout
Drought deciduous

26 Triangle-leaf Bursage
Leaves: simple, toothed, triangle-shaped

27 Triangle-leaf Bursage
Burrs in fall

28 Ratany Non-descript plant most of year Flowers: purple Fruit: spined

29 Ratany

30 Creosote Bush Leaves have a single pair of leaflets
Yellow flowers developing into white seed pods

31 Creosote Bush Creosote bush gall and midge

32 Desert Broom Leaves more like twigs

33 Desert Broom Leaves more like twigs

34 Burroweed Finely divided leaves Flowers: yellow turning to white
Last year’s flower stalks remain for long time

35 Burroweed

36 Canyon Ragweed Leaves: simple, long, triangle-shaped with toothed margin Usually occurs in washes and canyons

37 Canyon Ragweed Flowers: nondescript

38 Sotol (Desert Spoon) Rosette of leaves
Leaves have spines along edges but not at tips

39 Cacti

40 Saguaro

41 Saguaro Seed 2000 seeds/fruit 100 fruits/year
years = 20 million+ seeds in lifetime, But only one survives to replace individual in stable population

42 Saguaro Seedlings Grow under nurse plant Grow ½” first year
Grow 1’ in 15 years Grow 10’ in 40 years (mature)

43 Saguaro Fruit is edible
Flower: white, large, blooms at night and closes forever the next day

44 Southwest (or Fishhook) Barrel Cactus
Spines: long, hooked Fruit: yellow

45 Southwest (or Fishhook) Barrel Cactus
Flowers: yellow, orange, or red usually Plant usually leans

46 Hedgehog Cacti Multiple heads Spines not as dense as pincushion cacti

47 Prickly Pear Cacti Pads Flowers: many colors Fruit: purple when ripe

48 Fishhook Pincushion Cactus
Very dense spines Ring of pink flowers near top Spines: longest with hooks

49 Chain-fruit (or Jumping) Cholla
Fruit stay attached and form chains. Flowers: often pink

50 Chain-fruit (or Jumping) Cholla
Blown up 350x; overlapping scales on spine make pulling out the spine very difficult

51 Teddybear Cholla Fruit are single and do not form chains.

52 Teddybear Cholla Spines: tend to be more dense than chain-fruit cholla

53 Staghorn Cholla Spines less dense and arms more spreading than chain-fruit or teddy-bear cholla

54 Christmas Cholla One spine per areole Red fruit in winter
Thin segments


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